I have an old camelbak mule that has served me well for forever.
My wife has a newer one that holds the pack body away from you back with a mesh thing. Seems pretty nice, but she won’t let me use it lol.
They make bigger than the Raptor, but I don’t think you’d really want to ride with much more.
Camelbak MULE is the standard otherwise, it doesn’t have some of the cool features of Osprey and I don’t like the bite valve as much, but it’s available everywhere are frequently on sale.
I have an old camelbak ‘unbottle’ that I throw into whichever backpack is the appropriate size for what I’m doing, since all of mine have tube ports.
FWIW if you don’t like the bite valve design, but you like the pack and everything else, you can just remove the valve and push in Camelbak’s provided the ID of the tube is the same, and most are.
I think there’s a missing decimal point there, probably means 1.5L?
I have a hydrapak Soquel in bright teal/green that I use for running/xc mtb
It has enough space for a 2 liter reservoir, pump, shock pump, multitool, co2s, a tube, and a few energy bars. Not enough space for any extra layers. I like the hydrapak bladders because they are easily reversed for cleaning. Good size for what I’m trying to carry, but def not a big day trek sort of thing.
i like platypus bladders the best. but the magnetic clip that osprey has is pretty cool.
just buy whatever is cheap/on sale dgaf.
osprey is great, have 2 of their backpacking packs. the cycling packs are a little on the portly side tho.
edit: make sure you get a bladder with a wide-mouth opening so you can stop at a gas station and fill it to the brim with ice, then add water for hours of icy water and a cool back.