diff --git a/src/global.d.ts b/src/global.d.ts
index b9daab99..de9e4a9d 100644
--- a/src/global.d.ts
+++ b/src/global.d.ts
@@ -24,7 +24,7 @@ interface ImportMeta {
     MODE: 'development' | 'production';
     PROD: boolean;
     VITE_APP_CTP_API_URL: string;
-    VITE_APP_CTP_AUTH_UR: string;
+    VITE_APP_CTP_AUTH_URL: string;
     VITE_APP_CTP_CLIENT_ID: string;
     VITE_APP_CTP_CLIENT_SECRET: string;
     VITE_APP_CTP_PROJECT_KEY: string;
diff --git a/src/pages/CartPage/model/CartPageModel.ts b/src/pages/CartPage/model/CartPageModel.ts
index 4bfc757a..7ec7fef2 100644
--- a/src/pages/CartPage/model/CartPageModel.ts
+++ b/src/pages/CartPage/model/CartPageModel.ts
@@ -4,6 +4,7 @@ import type { Page } from '@/shared/types/page.ts';
 import SummaryModel from '@/entities/Summary/model/SummaryModel.ts';
 import getCartModel from '@/shared/API/cart/model/CartModel.ts';
 import getCustomerModel from '@/shared/API/customer/model/CustomerModel.ts';
+import { isChannelMessage } from '@/shared/API/types/validation.ts';
 import LoaderModel from '@/shared/Loader/model/LoaderModel.ts';
 import getStore from '@/shared/Store/Store.ts';
 import { setCurrentPage } from '@/shared/Store/actions.ts';
@@ -12,6 +13,7 @@ import { SERVER_MESSAGE_KEY } from '@/shared/constants/messages.ts';
 import { PAGE_ID } from '@/shared/constants/pages.ts';
 import { LOADER_SIZE } from '@/shared/constants/sizes.ts';
 import { CartActive } from '@/shared/types/cart.ts';
+import { ChannelMessage } from '@/shared/types/channel.ts';
 import { promoCodeAppliedMessage, promoCodeDeleteMessage } from '@/shared/utils/messageTemplates.ts';
 import { showErrorMessage, showSuccessMessage } from '@/shared/utils/userMessage.ts';
 import ProductOrderModel from '@/widgets/ProductOrder/model/ProductOrderModel.ts';
@@ -29,6 +31,8 @@ class CartPageModel implements Page {
 
   private cartCouponSummary: SummaryModel;
 
+  private channel: BroadcastChannel;
+
   private productCouponSummary: SummaryModel;
 
   private productsItem: ProductOrderModel[] = [];
@@ -36,19 +40,36 @@ class CartPageModel implements Page {
   private view: CartPageView;
 
   constructor(parent: HTMLDivElement) {
+    this.channel = new BroadcastChannel(`${import.meta.env.VITE_APP_CTP_PROJECT_KEY}`);
+    this.channel.onmessage = this.onChannelMessage.bind(this);
     this.cartCouponSummary = new SummaryModel(TITLE_SUMMARY.cart, this.deleteDiscountHandler.bind(this));
     this.productCouponSummary = new SummaryModel(TITLE_SUMMARY.product, this.deleteDiscountHandler.bind(this));
     this.view = new CartPageView(
       parent,
       this.cartCouponSummary,
       this.productCouponSummary,
-      this.clearCart.bind(this),
+      this.clearCartHandler.bind(this),
       this.addDiscountHandler.bind(this),
     );
 
     this.init().catch(showErrorMessage);
   }
 
+  private addDiscount(cart: Cart): void {
+    this.cart = cart;
+    this.productsItem.forEach((productItem) => {
+      const idLine = productItem.getProduct().lineItemId;
+      const updateLine = this.cart?.products.find((item) => item.lineItemId === idLine);
+      if (updateLine) {
+        productItem.setProduct(updateLine);
+        productItem.updateProductHandler(CartActive.UPDATE).catch(showErrorMessage);
+      }
+    });
+    this.cartCouponSummary.update(this.cart.discountsCart);
+    this.productCouponSummary.update(this.cart.discountsProduct);
+    this.view.updateTotal(this.cart);
+  }
+
   private async addDiscountHandler(discountCode: string): Promise<void> {
     if (discountCode.trim()) {
       if (discountCode.trim() === HAPPY_BIRTHDAY) {
@@ -61,18 +82,8 @@ class CartPageModel implements Page {
         .then((cart) => {
           if (cart) {
             showSuccessMessage(promoCodeAppliedMessage(discountCode));
-            this.cart = cart;
-            this.productsItem.forEach((productItem) => {
-              const idLine = productItem.getProduct().lineItemId;
-              const updateLine = this.cart?.products.find((item) => item.lineItemId === idLine);
-              if (updateLine) {
-                productItem.setProduct(updateLine);
-                productItem.updateProductHandler(CartActive.UPDATE).catch(showErrorMessage);
-              }
-            });
-            this.cartCouponSummary.update(this.cart.discountsCart);
-            this.productCouponSummary.update(this.cart.discountsProduct);
-            this.view.updateTotal(this.cart);
+            this.channel.postMessage({ cart, type: ChannelMessage.ADD_DISCOUNT });
+            this.addDiscount(cart);
           }
         })
         .catch(showErrorMessage)
@@ -80,17 +91,37 @@ class CartPageModel implements Page {
     }
   }
 
-  private changeProductHandler(cart: Cart): void {
+  private addProduct(cart: Cart): void {
+    this.cart = cart;
+    const newItem = new ProductOrderModel(
+      this.cart.products[this.cart.products.length - 1],
+      this.changeProductHandler.bind(this),
+    );
+    this.productsItem.push(newItem);
+    if (this.productsItem.length > 1) {
+      this.view.addItem(newItem);
+      this.cartCouponSummary.update(this.cart.discountsCart);
+      this.productCouponSummary.update(this.cart.discountsProduct);
+      this.view.updateTotal(this.cart);
+    } else {
+      this.view.renderCart(this.productsItem);
+    }
+  }
+
+  private changeProduct(cart: Cart): void {
     this.cart = cart;
     this.productsItem = this.productsItem.filter((productItem) => {
       const searchEl = this.cart?.products.find((item) => item.lineItemId === productItem.getProduct().lineItemId);
+      if (searchEl) {
+        productItem.setProduct(searchEl);
+        productItem.updateProductHandler(CartActive.UPDATE).catch(showErrorMessage);
+      }
       if (!searchEl) {
         productItem.getHTML().remove();
         return false;
       }
       return true;
     });
-
     if (!this.productsItem.length) {
       this.view.renderEmpty();
     }
@@ -99,6 +130,11 @@ class CartPageModel implements Page {
     this.view.updateTotal(this.cart);
   }
 
+  private changeProductHandler(cart: Cart): void {
+    this.changeProduct(cart);
+    this.channel.postMessage({ cart, type: ChannelMessage.ITEM_CHANGE });
+  }
+
   private async checkBirthday(): Promise<void> {
     if (!getStore().getState().isUserLoggedIn) {
       throw showErrorMessage(SERVER_MESSAGE_KEY.COUPON_NEED_LOGIN);
@@ -124,21 +160,26 @@ class CartPageModel implements Page {
     }
   }
 
-  private async clearCart(): Promise<void> {
+  private clearCart(cart: Cart | null): void {
+    this.cart = cart;
+    showSuccessMessage(SERVER_MESSAGE_KEY.SUCCESSFUL_CLEAR_CART);
+    this.productsItem = this.productsItem.filter((productItem) => {
+      const searchEl = this.cart?.products.find((item) => item.lineItemId === productItem.getProduct().lineItemId);
+      if (!searchEl) {
+        productItem.getHTML().remove();
+        return false;
+      }
+      return true;
+    });
+    this.renderCart();
+  }
+
+  private async clearCartHandler(): Promise<void> {
     await getCartModel()
       .clearCart()
       .then((cart) => {
-        this.cart = cart;
-        showSuccessMessage(SERVER_MESSAGE_KEY.SUCCESSFUL_CLEAR_CART);
-        this.productsItem = this.productsItem.filter((productItem) => {
-          const searchEl = this.cart?.products.find((item) => item.lineItemId === productItem.getProduct().lineItemId);
-          if (!searchEl) {
-            productItem.getHTML().remove();
-            return false;
-          }
-          return true;
-        });
-        this.renderCart();
+        this.channel.postMessage({ cart, type: ChannelMessage.CLEAR_CART });
+        this.clearCart(cart);
       })
       .catch((error: Error) => {
         showErrorMessage(error);
@@ -146,6 +187,21 @@ class CartPageModel implements Page {
       });
   }
 
+  private deleteDiscount(cart: Cart): void {
+    this.cart = cart;
+    this.productsItem.forEach((productItem) => {
+      const idLine = productItem.getProduct().lineItemId;
+      const updateLine = this.cart?.products.find((item) => item.lineItemId === idLine);
+      if (updateLine) {
+        productItem.setProduct(updateLine);
+        productItem.updateProductHandler(CartActive.UPDATE).catch(showErrorMessage);
+      }
+    });
+    this.cartCouponSummary.update(this.cart.discountsCart);
+    this.productCouponSummary.update(this.cart.discountsProduct);
+    this.view.updateTotal(this.cart);
+  }
+
   private async deleteDiscountHandler(coupon: Coupon): Promise<void> {
     const loader = new LoaderModel(LOADER_SIZE.SMALL).getHTML();
     this.view.getCouponButton().append(loader);
@@ -154,18 +210,8 @@ class CartPageModel implements Page {
       .then((cart) => {
         if (cart) {
           showSuccessMessage(promoCodeDeleteMessage(coupon.discountCode));
-          this.cart = cart;
-          this.productsItem.forEach((productItem) => {
-            const idLine = productItem.getProduct().lineItemId;
-            const updateLine = this.cart?.products.find((item) => item.lineItemId === idLine);
-            if (updateLine) {
-              productItem.setProduct(updateLine);
-              productItem.updateProductHandler(CartActive.UPDATE).catch(showErrorMessage);
-            }
-          });
-          this.cartCouponSummary.update(this.cart.discountsCart);
-          this.productCouponSummary.update(this.cart.discountsProduct);
-          this.view.updateTotal(this.cart);
+          this.channel.postMessage({ cart, type: ChannelMessage.DELETE_COUPON });
+          this.deleteDiscount(cart);
         }
       })
       .catch(showErrorMessage)
@@ -179,6 +225,34 @@ class CartPageModel implements Page {
     observeStore(selectCurrentLanguage, () => this.view.updateLanguage());
   }
 
+  private onChannelMessage(event: MessageEvent): void {
+    if (isChannelMessage(event.data)) {
+      switch (event.data.type) {
+        case ChannelMessage.ADD_DISCOUNT:
+          this.addDiscount(event.data.cart);
+          break;
+        case ChannelMessage.ADD_PRODUCT:
+          this.addProduct(event.data.cart);
+          break;
+        case ChannelMessage.DELETE_COUPON:
+          this.deleteDiscount(event.data.cart);
+          break;
+        case ChannelMessage.CLEAR_CART:
+          this.clearCart(event.data.cart);
+          break;
+        case ChannelMessage.ITEM_CHANGE:
+          this.changeProduct(event.data.cart);
+          break;
+        default:
+          break;
+      }
+
+      if (event.data.cart) {
+        getCartModel().dispatchUpdate(event.data.cart);
+      }
+    }
+  }
+
   private renderCart(): void {
     if (this.cart) {
       this.cart.products.forEach((product) => {
diff --git a/src/pages/CartPage/view/CartPageView.ts b/src/pages/CartPage/view/CartPageView.ts
index 69fb60b0..67929e93 100644
--- a/src/pages/CartPage/view/CartPageView.ts
+++ b/src/pages/CartPage/view/CartPageView.ts
@@ -316,6 +316,11 @@ class CartPageView {
     });
   }
 
+  public addItem(productsItem: ProductOrderModel): void {
+    this.productRow.push(productsItem.getHTML());
+    this.tableBody?.append(productsItem.getHTML());
+  }
+
   public getCouponButton(): HTMLButtonElement {
     return this.couponButton;
   }
@@ -332,7 +337,10 @@ class CartPageView {
     this.productRow.map((productEl) => productEl.remove());
     this.productRow = [];
     this.addTableHeader();
-    productsItem.forEach((productEl) => this.tableBody?.append(productEl.getHTML()));
+    productsItem.forEach((productEl) => {
+      this.productRow.push(productEl.getHTML());
+      this.tableBody?.append(productEl.getHTML());
+    });
     this.addTotalInfo();
   }
 
diff --git a/src/shared/API/cart/model/CartModel.ts b/src/shared/API/cart/model/CartModel.ts
index 52df6eb3..1f043028 100644
--- a/src/shared/API/cart/model/CartModel.ts
+++ b/src/shared/API/cart/model/CartModel.ts
@@ -12,6 +12,7 @@ import type {
 import getStore from '@/shared/Store/Store.ts';
 import { setAnonymousCartId, setAnonymousId } from '@/shared/Store/actions.ts';
 import { PRICE_FRACTIONS } from '@/shared/constants/product.ts';
+import { ChannelMessage } from '@/shared/types/channel.ts';
 import { showErrorMessage } from '@/shared/utils/userMessage.ts';
 
 import type { OptionsRequest } from '../../types/type.ts';
@@ -36,9 +37,12 @@ type Callback = (cart: Cart) => boolean;
 export class CartModel {
   private callback: Callback[] = [];
 
+  private channel: BroadcastChannel;
+
   private root: CartApi;
 
   constructor() {
+    this.channel = new BroadcastChannel(`${import.meta.env.VITE_APP_CTP_PROJECT_KEY}`);
     this.root = new CartApi();
     this.getCart()
       .then((cart) => {
@@ -163,10 +167,6 @@ export class CartModel {
     await Promise.all(otherCarts.map((id) => this.root.deleteCart(id)));
   }
 
-  private dispatchUpdate(cart: Cart): void {
-    this.callback.forEach((callback) => callback(cart));
-  }
-
   private async getAnonymousCart(anonymousCartId: string): Promise<Cart | null> {
     const data = await this.root.getAnonymCart(anonymousCartId);
     if (!data.body.customerId) {
@@ -283,6 +283,7 @@ export class CartModel {
     const data = await this.root.updateCart(cart, actions);
     const result = this.getCartFromData(data);
     this.dispatchUpdate(result);
+    this.channel.postMessage({ cart: result, type: ChannelMessage.ADD_PRODUCT });
     return result;
   }
 
@@ -341,10 +342,14 @@ export class CartModel {
     ];
     const data = await this.root.updateCart(cart, actions);
     const result = this.getCartFromData(data);
-    this.dispatchUpdate(cart);
+    this.dispatchUpdate(result);
     return result;
   }
 
+  public dispatchUpdate(cart: Cart): void {
+    this.callback.forEach((callback) => callback(cart));
+  }
+
   public async editProductCount(editCartItem: EditCartItem): Promise<Cart> {
     const cart = await this.getCart();
 
@@ -358,7 +363,7 @@ export class CartModel {
 
     const data = await this.root.updateCart(cart, actions);
     const result = this.getCartFromData(data);
-    this.dispatchUpdate(cart);
+    this.dispatchUpdate(result);
     return result;
   }
 
diff --git a/src/shared/API/sdk/client.ts b/src/shared/API/sdk/client.ts
index bc4c7f0a..5dbd43f4 100644
--- a/src/shared/API/sdk/client.ts
+++ b/src/shared/API/sdk/client.ts
@@ -1,7 +1,7 @@
 import type { UserCredentials } from '@/shared/types/user';
 
 import getStore from '@/shared/Store/Store.ts';
-import { setAnonymousId } from '@/shared/Store/actions.ts';
+import { setAnonymousId, setAuthToken, switchIsUserLoggedIn } from '@/shared/Store/actions.ts';
 import { type ByProjectKeyRequestBuilder, createApiBuilderFromCtpClient } from '@commercetools/platform-sdk';
 import {
   type AnonymousAuthMiddlewareOptions,
@@ -51,6 +51,9 @@ export class ApiClient {
     this.clientID = CLIENT_ID;
     this.clientSecret = CLIENT_SECRET;
     this.scopes = SCOPES.split(' ');
+    if (USE_SAVE_TOKEN) {
+      this.checkSaveToken();
+    }
 
     if (USE_SAVE_TOKEN && getStore().getState().authToken) {
       this.authConnection = this.createAuthConnectionWithRefreshToken();
@@ -93,20 +96,48 @@ export class ApiClient {
     }
   }
 
+  private checkSaveToken(): void {
+    const { anonymousToken, authToken } = getStore().getState();
+    if (authToken && authToken.expirationTime < Date.now()) {
+      localStorage.clear();
+      getStore().dispatch(setAuthToken(null));
+      getStore().dispatch(switchIsUserLoggedIn(false));
+      getTokenCache(TokenType.AUTH).clear();
+    }
+    if (anonymousToken && anonymousToken.expirationTime < Date.now()) {
+      localStorage.clear();
+      getStore().dispatch(setAnonymousId(null));
+      getTokenCache(TokenType.ANONYM).clear();
+    }
+  }
+
   private createAnonymConnection(): ByProjectKeyRequestBuilder {
     const defaultOptions = this.getDefaultOptions(TokenType.ANONYM);
     const client = this.getDefaultClient();
-    const anonymousId = uuid();
 
-    const anonymOptions: AnonymousAuthMiddlewareOptions = {
+    let anonymOptions: AnonymousAuthMiddlewareOptions = {
       ...defaultOptions,
       credentials: {
         ...defaultOptions.credentials,
-        anonymousId,
       },
     };
+
+    const saveAnonymousId = getStore().getState().anonymousId;
+    if (!saveAnonymousId) {
+      const anonymousId = uuid();
+
+      anonymOptions = {
+        ...defaultOptions,
+        credentials: {
+          ...defaultOptions.credentials,
+          anonymousId,
+        },
+      };
+      getStore().dispatch(setAnonymousId(anonymousId));
+    }
+
     client.withAnonymousSessionFlow(anonymOptions);
-    getStore().dispatch(setAnonymousId(anonymousId));
+
     this.anonymConnection = this.getConnection(client.build());
     return this.anonymConnection;
   }
@@ -146,7 +177,7 @@ export class ApiClient {
       host: URL_AUTH,
       projectKey: this.projectKey,
       scopes: this.scopes,
-      tokenCache: USE_SAVE_TOKEN && tokenType === TokenType.AUTH ? getTokenCache(tokenType) : undefined,
+      tokenCache: USE_SAVE_TOKEN ? getTokenCache(tokenType) : undefined,
     };
   }
 
diff --git a/src/shared/API/types/validation.ts b/src/shared/API/types/validation.ts
index 2be23a7b..c2432944 100644
--- a/src/shared/API/types/validation.ts
+++ b/src/shared/API/types/validation.ts
@@ -1,3 +1,4 @@
+import type { ChannelMessageType } from '@/shared/types/channel';
 import type {
   AttributePlainEnumValue,
   Cart,
@@ -260,3 +261,14 @@ export function isProductDiscountPagedQueryResponse(data: unknown): data is Prod
       Array.isArray(data.results),
   );
 }
+
+export function isChannelMessage(data: unknown): data is ChannelMessageType {
+  return Boolean(
+    typeof data === 'object' &&
+      data &&
+      'type' in data &&
+      typeof data.type === 'string' &&
+      'cart' in data &&
+      data.cart !== undefined,
+  );
+}
diff --git a/src/shared/types/channel.ts b/src/shared/types/channel.ts
new file mode 100644
index 00000000..de666b4b
--- /dev/null
+++ b/src/shared/types/channel.ts
@@ -0,0 +1,14 @@
+import type { Cart } from './cart';
+
+export enum ChannelMessage {
+  ADD_DISCOUNT = 'ADD_DISCOUNT',
+  ADD_PRODUCT = 'ADD_PRODUCT',
+  CLEAR_CART = 'CLEAR_CART',
+  DELETE_COUPON = 'DELETE_COUPON',
+  ITEM_CHANGE = 'ITEM_CHANGE',
+}
+
+export interface ChannelMessageType {
+  cart: Cart;
+  type: ChannelMessage;
+}
diff --git a/src/widgets/ProductOrder/model/ProductOrderModel.ts b/src/widgets/ProductOrder/model/ProductOrderModel.ts
index c6d27812..4303adf8 100644
--- a/src/widgets/ProductOrder/model/ProductOrderModel.ts
+++ b/src/widgets/ProductOrder/model/ProductOrderModel.ts
@@ -94,7 +94,7 @@ class ProductOrderModel {
     }
   }
 
-  public getHTML(): HTMLDivElement {
+  public getHTML(): HTMLTableRowElement {
     return this.view.getHTML();
   }
 
diff --git a/src/widgets/ProductOrder/view/ProductOrderView.ts b/src/widgets/ProductOrder/view/ProductOrderView.ts
index 3889af7f..58af8a42 100644
--- a/src/widgets/ProductOrder/view/ProductOrderView.ts
+++ b/src/widgets/ProductOrder/view/ProductOrderView.ts
@@ -208,7 +208,7 @@ class ProductOrderView {
     return this.deleteButton;
   }
 
-  public getHTML(): HTMLDivElement {
+  public getHTML(): HTMLTableRowElement {
     return this.view;
   }