Camelbacks are cool, but cost a little too much for my immediate purshase.<br><br>ALTERNATIVE<br><br>a medical intraveanus drip set!! (not the ones with blood : ))!<br><br>Its cheap, collapsible, durable (it really is!) and convenient. No need to stop and lug out your bottle from your backpack - tube hangs over your shoulder.<br><br>I can wright an essay on this (which i might just do), but i don't want to bore you. its just food for thaught...