I am not associated with The Joy Factory; I am also not responsible for anything that happens to your iPhone 4, in the event that something does happen if you decide to try this.
I bought the case from The Joy Factory’s website for $39.95. In this video I am using my iPhone 4 underwater with The Joy Factory’s RainBallet Waterproof Case. I tested the case for about 5-6 hours with my dummy iPhone 4, before I decide to try it with my real iPhone 4. The case seems to be a solid waterproof case, so far I haven’t had any problems or leakage while using this case. I will have a full review of the The Joy Factory’s RainBallet Waterproof Case up soon.