Gooper – Multi use drybag Gooper’s DryBags are different. Automatically self-locking. In fact, the DryBag is always closed and you will need to open it to put things inside. Once you are done – let go. That’s it. We have tested our bags many meters under water and have gone diving to 30 meters and beyond. Please, before you take your cell phones or cameras deep under water, make sure with the manufacturer that they can withstand the pressure.