[header] How to keep snacks fresh [title] Purchase a plastic clip. [step] The clips are usually found in the kitchen gadgets aisle at discount stores. Purchase the type with an attached magnet as they are easy to store on the refrigerator. 
When needed, just grab a clip off the fridge, fold down the sack of chips or other bagged snacks, and attach. [title] Use a plastic or wooden clothespin.