Creative Paperclay® needs to be kept moist after the package is opened. Here’s how I store my unused Creative Paperclay. I keep the material in the original bag, but before reclosing it, I mist it with a few spritzes of water. I keep a mini-mister filled with water right on my worktable so it’s always handy. Then, I squeeze out as much air as possible, and put the package in a food saver bag and vacuum seal it. [My food saver is similar to this one: http://www.samsclub.com/sams/foodsaver-v4800-machine/prod11060612.ip] I love getting double duty out of my food saver!!