If you have tried to switch to reusable shopping bags, you have probably learned that the hardest part is simply remembering to bring your bags with you each time you go shopping. Because not all shopping trips are planned, this is even more difficult. Flip & tumble’s shopping bags get around the problem of remembering the bags because they are small enough to simply live in your purse or messenger bag all the time. That way they are simply there when you need them.