like one that i can trust to put my Digital Camera underwater and take pictures?
Most Digital Camera have their own or recommends a third party underwater case. Depending on the make, model, size of your Digital Camera and depth you are going down to, my suggestion is to first go to the manufacturer's website and check out the accessories. Otherwise, you can select either a solid, hard underwater camera casing or a soft zip-lock type version. Of course, the hard body/cases are more expensive than the zip-lock versions.
If you are only going to water parks and or vacationing and going to pools and about 10 feet deep, I suggest the zip-lock versions by DryPak, DiCaPac or AquaPac or any similar manufacturer. For scuba diving, I suggest hard bodies which also works for more expensive DSLR cameras. Please take note that water pressure (depth you go down to) also needs to be factored in. Most camera's shutter release button will react to water pressure in a given depth.
Good luck and I hope this helps.