A hairbrush alone is a fine thing to carry around. A hairbrush that sprays a misty shot of water? Sure, we can kind of see that. But a hairbrush that de-tangles your locks, waters them...and charges via USB? It’s hard to understand a scenario where that gadget is necessary. The Self-Misting Hairbrush exists though, and it holds enough water for 30 minutes of misting while the battery can power a stream for up to 2 hours and 30 minutes. Of course, we have to ask: whose bed-head is that bad?