This 0.5  litre MacMarathon drinking system by Tripper is designed specifically for kayak and canoe marathon racing. The unit consists of a 0.5 litre bladder with a stiff loop which can be easily popped over the competitor’s head at portage.  The unit comes in a range of colours which further aids the competitor’s  seconds  in drink sequence. 
FEATURES
Transparent plastic card holder for inserting the competitor’s name and/or drink sequence.  
Velcro loop to keep drinking tube close to the mouth.  
The liquid supply is controlled by a ratchet clamp which allows for a very fast one handed operation. 
The ratchet clamp has the duel function of allowing the user to adjust the length of the drinking tube to individual requirements.
The unit is extremely sturdy and will easily survive exceptionally robust usage on the transitions. 
A filler funnel is supplied for easy filling of the  drinking system.