You can always remain focused on the road ahead thanks to the thermomoulded bottom, wide cap and high-flow valve that you can find on the Speed 42 flask, making storage, drinking and refilling even easier. The bottle shrinks as you drink it, letting you know exactly how much you have left. This bottle also features a thermoformed bottom, 42mm wide cap and flow valve, making drinking, refilling and storing quick and easy, so you can focus on the trail ahead. With this bottle, which shrinks as you drink and so you'll know exactly how much you have left. Weight: 33g