The smaller 1.2L Hydrat is a great hydration option for a range of trips. The lightweight, low bulk design is easy-to-use and comes with an insulated quick change hose.
Raidlight says:
These sizes of hydration reservoir are suitable for all packs and vests. The bite valve has a locking system to ensure no annoying dribbles.
Raidlight's Hydrat 1.2L Bladder is a great low weight, low bulk hydration solution. It is ideal for days out running and walking. The pipe attaches using a sliding lock top you can fill up faster, add powders easily, get in there to clean it properly and not worry about it leaking later. The drinking pipe fits snugly into the bladder with a complicated looking, but easy to use button mechanism.
As with many Raidlight designs there are some nice extras. The reservoir bag can be hung from different points depending on how you are using it. The insulated foam sleeve helps keep your drinks cool in the summer and helps stop liquid from freezing in the tube in cold conditions.