When I want a drink, I pull my canteen off my belt and guzzle. Why have I never thought, "This is so much effort to bend my arm, I wish I had a plastic tube thingy to suckle water out of"?
What am I missing out on? 
Dave 
bigmbogo,
I have tried many methods of carrying water.  A canteen on my belt pulls down on my pants.  I tried a fanny pack.  It had the same effect.  I tried a water bottle in a pouch slung over my shoulder.  I did not like it bouncing against my body and feeling like it was going to slide off my shoulder.  A backpack has been best for me.  Once I have worn it for a few minutes I forget I am carrying it.  The tube is an added convenience.  Here in Arizona you need to keep drinking.  I like to hike.  Some things can get annoying after a few miles in the Arizona heat; high for 6/5/07 is 106F.