4 pcs Set Shopping Trolley Reusable Bags - Without cooler BagTrolley Bags are a system of reusable shopping bags that are used to pack your shopping at the supermarket checkout. In one simple action the trolley bags system spreads out and rests on any supermarket trolley giving you a series of open and upright bags into which you can pack and sort your shopping with both hands. REUSABLE We have taken the "reusable grocery bags" concept to the next level, making them effective. CONVENIENT Easy to use and helps