Ortlieb Drinking-tube

"The Ortlieb drinking tube is the perfect tool for anyone who doesn't want to do without a regular supply of liquid when they're out and about. Whether for urban commuting or at work, this drinking tube transforms every ORTLIEB water container and common PETbottles into a practical, mobile drinking system in no time at all. Handling is very simple: Remove the dosing valve, insert the end of the tube into the water bag and screw on the cap with valve."
"With a length of 95 cm, the tube offers enough flexibility and reach to be able to drink comfortably without having to take the container out of the backpack. Equipped with a lockable bypass valve and a protective cap, the tube ensures hygienic use and prevents liquid leakage. The drinking tube is unisex and ideal for everyday urban life and leisure activities"