whats good?

I've got a hydrapack big sur and it's pretty good- bite valve not quite upto camelbak standards but reservoir reversible for drying and plenty of room to lose stuff.

Try some of the Camelbak ones: however be careful with fit, my Missus bought me one for my birthday, but sadly it came from their walking range. It has wider & stiffer shoulder straps than my old Mule, and TBH I think it will be really uncomfortable on longer rides (when I get some fitness back).

Mule. Best thing ever. 3l and £48.

Merlin link

if you have a look on wiggle they do a lezyne 3 l pack with pump toolkit , tyre levers etc for £35- bargain

i don't want the lezyne one as it has no waist strap 🙁