The 3.6 Liter (1 gallon) Canyon Jug will protect against water and crushing. It is great for cell phones, and smaller items. Works great on raft trips too.
Diameter: 198 mm or 7.795276 inches
Opening Diameter: 136 mm or 5.35433 inches
Total height: 171 mm or 6.73228 inches
Empty weight: 345g or .760595 pounds