Last year, I (re-)reviewed another Amphipod product, the RunLite Hydration Belt, which didn't exactly work well for me over the long run (pun intended).
Well, after being disappointed that I couldn't find one at my running store, I finally spotted a handheld version of Amphipod at Sport Chalet! Of course, I could have bought it online for the same price, but I wanted to hold it before buying, ya know?
(Yes, we brought gummy candy into the sports store... consider it long-run carbo-loading.)
The 20 oz water bottle detaches from the grip, which also contains a small compartment for things (really only large enough for pepper spray or gel). It's a bit tough to re-assemble after taking it apart, but this should get easier with time.
I typically fill mine with Vega Sport Optimizer!
It takes some getting used to, but it is a lot better than going without water, with a belt, or carrying a regular ol' water bottle like what I was doing for a while. The grip is snug around my hands, and it really doesn't bounce enough for me to become bothered, nor do I hear a very loud slosh slosh slosh like when I use other hydration methods. Also, no leaks!
It definitely holds more water than most hydration methods and is easy to take a sip from in the middle of running. Its shape makes it easy to keep on your hand, though I tend to switch hands periodically to stay balanced(?).
I will probably bring this to my half-marathon next month(!), because I'm not too sure they will provide what I feel is "enough" hydration on the course. In the meantime, I will keep training with it so it will feel like I'm carrying nothing at all! Okay, so maybe I am too wishful in my thinking, but I think this was the best handheld water bottle I could have chosen.