Designed in California, USA, Stasher bags are made of 100% pure platinum grade silicone, a standard even higher than food grade silicone, passing all U.S. safety requirements and even tougher European standards.
Silicone
Use soap and water to wash by hand or toss Stasher in your dishwasher.
Do not turn the bag inside out, it can compromise the bag's sealed edges.
Be careful with sharp objects as they may puncture the bags.