Raide Locking Cap Flask is a soft water bottle made by Hydrapak, featuring Raide's low-profile locking cap. The locking cap prevents the mouthpiece from leaking when the bottle is subjected to pressure – for example when it is compressed inside a running belt or a shorts or vest pocket.

The tapered, oval shape means the bottle lies flat and stable, and the transparent material makes it easy to see how much liquid remains.

The bottle is available in three sizes – 360 ml, 500 ml and 650 ml – so you can match the volume to your outing and to Raide's running belts and TrailTech shorts. The 500 ml and 650 ml versions are compatible with filter caps from Katadyn BeFree and Hydrapak (the 360 ml is not compatible with these). The bottle comes with a lifetime guarantee.