You’re about to walk into a downpour, and you know that try as you may, your phone is quite likely going to get wet. Even at the very heart of your bag, a rainy day might be victorious no matter what you do. While a regular case may protect your smartphone from bumps and jolts, you might need to find a different case for keeping it dry.
Whether you’re afraid a water bottle may bust in your bag, or you don’t want to meet a damp day unprepared, the Smartphone Sheath will protect your phone whatever the weather. There are versions made for the Samsung S3, and iDevices 4+. It’s essentially shrink wrap with a sealing tab. These come in a set of three for $16, but they have a limited lifespan. More than three uses is probably not a great idea.
Or you could just use a ziplock baggie.