Camelbak, bladders are very popular.
Decathlon do them for mountain biking, probably 1/3 the price of an equivalent motorcycle job, just make sure the straps are long enough to go over your jacketDoes your luggage travel in their support vans or do you have to strap it all to the bike each day?
I need to buy a 3L hydration bladder so any recommendations on this would be very much appreciated.
Thanks