Apotea concept with shopping cart

Made a shopping cart for the concept today. This is a first draft so be kind to me. :)

The idea is that the cart and "to checkout" appears only after you've chosen a product then it sticks to the top to always be one click away.

When it's precipitated it appears in a full screen mode with a scollable list in the middle.

Maybe, maybe not? What do you think?