ADAM W That bladder does not fit the camelbak blowfish at all

ROBERT D The Blowfish is designed for a 70 oz reservoir so this one is too big. You might be able to fit it in the pack but not be able to fill it full and the insulated sleeve will take up a little of the space as well. I would recommend going with a 70 oz reservoir to get the most out of the bladder to your pack size. If you must have the insulation then get this one (because it works well) but you will sacrifice water capacity for the insulation with the Blowfish pack.

TIM M I have an unbottle and also own a Blowfish. Unfortunately I'm away from home where the Blowfish is located, so can't actually try the unbottle in it. But, based on the unbottle shape and dimensions, I think it would fit in the Blowfish with no problem.

MIKE B I don't have the blowfish but since it has a 70oz bladder it may not fit. The unbottle is more designed for a hiking pack that has a designated pocket for a bladder.

ALEX K It's 17 inches in length and about 8.5 width unfilled. It's really great if you can fit it in your pack, really durable. Also I'd recommend using a katadyn water filter because the filter comes with an attachment that you can plug right into the camelbak and you don't have to open the top to fill it, which allows you to just throw the pack on the ground while you pump. My friend used his sterile pen thing and had to clean the water in a water bottle then poor it into his pack, which is bad too if you don't had clear water. I'm very happy with buy