Plastic Sandwich Bags - If you invest a few minutes on washing and drying your used plastic sandwich bags (as long as it did not contain raw meat, fish or eggs), you not only can use them again for food storage, but they can be of great use beyond their original purpose. Wash with warm soapy water, turn inside out and either dry them with dishtowel or leave out to dry. Try putting some into your backpack, purse, or even jacket pocket for an on the go trash can, for “litter” such as tissue, gum