In reply to Cuillin Calling:
Playpus lifetime warranty is very good - I've had a couple of replacements for ones that started leaking.
The Source ones are/were pretty indestructible. I've also got a North Face one that's still going after easily 15 years, my wife has a DaKine one that's about 10 years old. I've also got unused Osprey and Camelbak ones, but they are the 3l capacity, so too big for most uses.
My usual set up is a Platypus with a Camelbak neoprene sleeve over the hose - that's been fine snowboarding and winter walking. Osprey do have a really good one for winter with a well-insulated hose with a bit that zips over the bite valve.