Made by Source, the Deuter Streamer 2,0 has been popular for years. The top has a sliding closure system and the hose is clicked in the bladder with a nifty lock.
Volume three liters
The protective cap on the drinking head prevents it from getting dirty when mountain biking
Taste-free
Grunge-Guard liner for antibacterial action
Easy to fill, empty, wash and dry thanks to the entire top opening up
BPA-free, PFC-free