Works great for biking, too
I've used this mostly for my longer rides when a water bottle won't cut it. It holds a lot (I've got the 2L) and the water (or Gatorade, or whatever) tastes great even at the end. It's easy to clean, though I recommend getting Platypus' specific cleaners. I downgrade it only one star because getting ice cubes in is near impossible (unless you have the narrow tube kind). But, if you partially freeze overnight and top it off in the morning before you head out, it's perfect.