The e-commerce site allows users to have more than one basket at a time. Addition of items and checkout is performed against the current basket.
Quick link for current basket's page: 
Click the basket name in the banner of the site.
è To set a "current" basket:
1 Select My Baskets | All Baskets from the menu.
2 Click on any basket’s circle checkbox to make it the current basket.
For more information on multiple baskets and multiple shopping groups, see Shared Shopping.