Container for a Tubolito S-Tubo MTB bike tube. Tubolito S-Tubo is a super lightweight and small tube for MTB tires up to 2.5". It's my go to spare tube for my on-frame kit, rather than a regular butyl tube. This container fits the tube, the separate valve and the little tool to fasten the valve in the tube. Mount it to your frame with strips, stuff it in your small tool kit or remix and add your own frame mounts or room for other essentia accessories or whatever!