Along with being 100% water/air tight, the O.P.SAK (Odor Proof SAK) is also a 100% odor barrier bag.
You can store food undetected to bears and other pests in your campsite by sealing them in the OPSAK.
Also, because the OPSAK is FDA approved, you can use it in food preparation and storage.
You can even pour boiling water into the OPSAK because of its extreme heat resistance.
Hermetic Seal – An Absolute Airtight Seal Preventing the Re-entry or Release of Air and Micro-Organisms
Made in the USA
Traps Odors Inside the Re-sealable Lightweight Bag
Protects Against Microscopic Particles like Dust and Sand
Recyclable and Reusable