Hutch66:

You could always go to the local hardware store and buy some pvc pipe about the same diameter as the tubes you use. Cut the pvc to length, and cap one end permanently, and tape or just friction cap the other end. If the kit is not going to be tossed around too much, you can leave one end uncapped and just insert some paper or whatever so the squeeze tube is held in the pvc tube by the packing you use. Extra cotton or some other tinder material would serve a secondary purpose if necessary.

Bountyhunter