Whether or not you need a waterproof case is something only you can decide. But there are two things you should consider. If you have a waterproof case and you don’t ever drop your phone in the water or other liquid, there’s really no downside. On the other hand, if you drop your phone in the water—whether a puddle, the sink, or even the toilet—and it’s not in a waterproof case, it is likely to sustain serious water damage. That said, waterproof cases are often larger and more unwieldy than their non-waterproof counterparts, and they’re also usually more expensive. If you decide to go without one—which many people do successfully—be sure and be extra cautious when using your phone around water or any other liquid. Also, consider getting some insurance on your phone so if you ruin it, replacing it won’t be as expensive.