SWAP PRODUCT - OUTSIDE

Hello.

Does anyone know how to do to "SWAP PRODUCT" (photo with a red stripe) move like in the picture with a blue stripe.

Link to the blue bar page:

https://www.beaverworkshop.co.uk/shop/designer/

Link to my website (directly to the product):

http://www.weprinting.net/product/wooden-boxes-design-copy/

password: weprinting

Thanks in advance for your help