DURABLE & SAFE - This reusable silicone food storage bag made of food grade silicon, approved by FDA, no fillers, coating, BPA, BPS, BPF, PVC, phthalates, or any the poisonous chemicals LEAKPROOF - Designed with multi-groove, airtight seal, leakproof vacuum and zipper locked container, perfect for storing food and liquid, portable and save room
MULTIFUNCTIONAL - Excellent heat and cold resistant, temperature resistant range: -50℃～+250℃, can be boiled and used in microwave oven, refrigerator, toaster, freezer, dishwasher safe, available in kitchen and outdoors for carrying REUSABLE - This food-grade preservation bag is durable, safe silicon material, Eco-friendly, no toxic to human and environment, aging resitance, long lifespan, up to 30 years
TIPS AND TRICKS: The hermetic seal is very tight, so it is normal that you feel the zipper slider bar tighter the first few times. That is for the purpose of best preservation possible. Just wet the seal with a little edible oil or water and it will be slide well.