[ChuckDickerson]

Originally Posted by TheOtherGuy

This is the one you were talking about. We tested them and they're watertight up to at least 8 ft. (after smearing vaseline on the o-ring)

I advise caution using vaseline on the o-rings. I am not sure what material the o-ring is made of in these containers but vaseline is a petroleum product and will degrade some o-rings. There is a special silicone based o-ring grease made just for this purpose. Check a local dive shop and they will know what you are looking for. IIRC what we use at work is "Dow Corning 111".