Purple Circle Shopping Cart Liner. At Bambella Designs we understand the concerns of taking your infant shopping with the potential germs that may be lurking on the trolleys. That’s why we have designed a range of shopping cart liners made to fit perfectly between your child and the shopping trolley. All of our liners are naturally hygienic, easy to clean and available in a wide range of wonderful fabrics to choose from. You can now buy baby shopping cart liners online to ensure your child is protected from nasty germs and minimize the risk of sickness.