The silicone food storage bags are suitable for outdoors. When you are having a picnic , you can put the food into the silicone storage bags to retain freshness. Even if the liquid, it won't spill out because of the tight ABS sealing strip.
The advantages of silicone food storage bags:
Save the space for fridge
Can be heated by microwave
Suitbale for fridge , outdoor camping , travelling,etc..