Dry Bag/Case Question in Scuba and Snorkeling Posted March 19, 2005 The other thing you can search for is a "Pelican box". They make very small ones that are about the size of a credit card with a string to wear around your neck. They snap shut and are good down to about 100'. They also have bigger sizes, but mind you they are hard plastic boxes, so aren't moldable. You could also look at a travel website for something. A few years ago I got something called a "splash caddy" which is a fanny pack with the heavy duty ziplock bags inside. It worked very well for snorkeling and playing on the beach and also came in 2 sizes.