FOLDABLE CONTAINER - Each container can be folded to 1/3 of the original size for compact storage and organization, saving lots of space and better food storage. EVERYTHING SAFE - Food grade silicone, BPA free, non-toxic, eco-friendly, can be used at -40C~230C (-40F~446F), microwave and refrigerator. VALVE DESIGN - Snap-on lids with airtight, leak-proof seals made of food-grade silicone with steam release vent for safe and clean reheating of food. DIFFERENT VOLUME - 350ml: 13.1*9.7*6.3cm; 500ml: 16.5*11*6.3cm; 800ml: 18.5*12*6.5cm, you can choose the right storage box according to the actual situation. MULTIPLE USES - Suitable for indoor food storage, outdoor activities such as work, hiking, travel, etc., folded when not in use, easy to store. Product Description Features Buckle design to ensure air tightness and tightness Safe to use in microwave ovens and microwave ovens. refrigerators from -40C to 230C (-40F to 446F) Foldable design, easy to use and transport Capacities of 350/500/800 ml available Suitable for indoor food storage, outdoor activities such as working, hiking, tourism Specifications Material: Food Grade Silicone Color: Blue Small: 13.1 x 9.7 x 6.3cm / 5.2 x 3.8 x 2.5 inch Medium: 16.5 x 11 x 6.3cm / 6.5 x 4.3 x 2.5 inch Large: 18.5 x 12 x 6.5cm / 7.3 x 4.7 x 2.6inch Package includes 3 x Collapsible Silicone Food Box (350/500/800ml)