We all know what an invaluable piece of kit the camelbacks are. Quick, easy means of getting water into you whenever required whereever you are. Now more and more people are useing them, ive not been on an expedition recently without at least a few people having them, if not all. The latest rumour seems to be that soon they will be banned. One or two units already have I hear and others are likley to follow suit. Reason is that they are the cause of stomach disorders because of the tube not being cleaned. Anyone else heard this/any thorts?