Chip bag shrinkies: wash so all the chip crumbs and oils are out of the bag - gently dry with a paper towel. Place the bag on a greased piece of tin foil covering the baking sheet and put it into an oven set around 350*F and melt to the size you want. Small bags for earrings, etc.... I need to try this.. I remember doing this as a kid for my printers tray!