This ziplock bag is made of food grade silicone without any fillers, coating, BPA, BPS, BDF or PVC or any poisonous chemicals. Eco-friendly and recyclable material that is not harmful to the environment when disposed or burned. Desighed with airtight seal and ziplocked container to keep food fresh while keeping odors and liquid inside for much longer, which can make it easy to carry on and go for a camping trip. After used, you can fold them up or lay it flat, which is very convenient to store in the kitchen drawer or hanging on the hooks of the pantry.