Zip Top containers are made from platinum-cured food-grade silicone ("platinum silicone" for short), the highest grade available. It is food safe, microwave safe, freezer safe, and dishwasher safe.
Traditional plastic containers are petroleum based and can contain harmful chemicals. Because Zip Top containers are made from platinum silicone, it is free of BPA, lead, phthalates and PVC. It is also hypoallergenic.
Zip Top containers are built to last and can potentially be used thousands of times replacing disposable plastic bags and containers which will reduce waste.