i was drinkin a lucozade sport the other day, and examining the system they have in the lid, and wondered if that would work on the base section of all poles?
for those who dont know what it is, its like a rubber section with an x cut into it, that under the correct pressure, opens to let the liquid through. clearly there would be no pressure required, but a rubber section with slots cut so the pole hose can be pushed through, tight enough to clean the hose, but loose enough to allow it to move freely upon extension.