Fischer Drinkbelt Caps

**Warning: despite a couple of attempts I haven't managed to fully stop leaking of pipe variant.** The **simple** and **tube** don't leak. Flat horizontal surfaces tend to be porous so I've moved to a curved design.

I've bought a Fischer cross country skiing drinkbelt which had a bit overdesigned cap with a pipe and rubber closing. In less than a year the inner pin in the pipe broke off so the whole cap was useless. I've asked in the shop for replacement and they said they don't sell spare ca