Thanks for replies.

Phaedrus: I have seen those. It's a pity I cant find them here. The size might not be a problem but the weight might. While carrying full 0.6 l (20.3 oz) fist bottle in my hand on some summer runs is not a problem for me, carrying something heavy in my cargo pants pocket is a lot more noticeable if I am running up the steep hill or 10+ km (6.2+ miles).

Art: That Platypus doesn't look bad. They should have made the 0.25 l (8.45 oz) version too. I can get it here where I live so I might eventually try it but it's roughly 1/3 price of a hydration pack so I will see.

Anyway I got some small (but still not perfect) items from a grocery store today so I am going to try them out soon.

I have also found this: http://www.webpackaging.com/packaging-su...rage-products-/