Raide Research Locking Cap Flask (650 ML)

This flask feels soft and supple and adapts to the shape of your belt or vest. As you drink, it shrinks with you, so nothing sloshes. You twist the cap shut, so the nozzle doesn't pop open when the bottle is squeezed.

It works best in a snug running belt or a well-adjusted trail vest. Think of a long run or a trail run of a few hours where your bottle is clamped against your back or hips the whole time. That is exactly when you notice the difference: no wet back or shorts from a leaking nozzle. On trips in the mountains or the Ardennes you can fit a water filter and refill at a stream.

If you're unsure, think about how you drink. Because you open the cap first, it is less convenient if you want to drink in one movement during a fast race. The flask is fairly long, so check that it fits in the pockets of your vest. If you have a Raide Research belt, this is the flask it was made for.

In short: a leak-proof flask for anyone who carries their drink snugly in a belt or vest.