What's a good waterproof / underwater iPhone 6 case?

Going on vacation and we'll be at the beach and pool the majority of the time. I wanna be able to take pictures under water. Haven't found one I truly trust cause I'm scared there will be a defect or that they don't mention I can only have my phone under a certain limit before water starts seeping in. I'm also not looking to spend 50 bucks on it. I believe there are quality products for less

Lifeproof case for the iphone 6