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 contracts so that nothing sloshes. You twist the cap shut, preventing the mouthpiece from popping open when the bottle is squeezed.

It performs best in a snug-fitting running belt or a well-adjusted trail vest. Think of a long endurance run or a trail run of a few hours where your bottle is pressed against your back or hips the entire time. That is precisely when you notice the difference: no wet back or pants from a leaking mouthpiece. On trips in the mountains or the Ardennes, you can attach a water filter and refill at a stream along the way.

If in doubt, consider how you drink. Because you open the cap first, it is less convenient if you want to drink in one go during a fast match. The bottle is quite long, so check if it fits in the pockets of your vest. If you have a Raide Research belt, this is the bottle it is made for.

In short: a leak-proof flask for those who wear their drink tightly in a belt or vest.