Trolley Bags are a system of 4 reusable shopping bags that are used to pack your shopping at the supermarket checkout. In one simple action the system spreads out and rests on any supermarket trolley, giving you 4 open and upright bags into which you can use both hands to pack and sort your shopping. The 4 colour coded bags allow you to pack everything, the way you want, in half the time. After the checkout, simply detach the bags and place into your car boot, when you arrive home, there are only 4 bags to carry inside and they're easier to unpack too. Packing, Sorted!