Hydrapak HydraSleeve – Insulated Sleeve with Shape-Shift Low-Profile Water Bladder/Reservoir for Hydration Backpacks, 3-Liter (100 oz.), High Flow Bite Valve, Safe & Reliable

Honestly the best system I’ve ever used.It has a slight (unavoidable) taste on the first run through. Not a foul taste by any means though.Nice flow rate and adjustable to boot! No leaks. Nice and sturdy. Having the wide opening for filling as well as flipping it inside out for the top rack of the dishwasher is an absolute delight. No more mold or mildew with hard to clean areas!Kept my water cool all day long. By cool I mean chilled (had the bladders themselves in a chill bag with ice on the way to the trail head)! Definitely not for the ultralight folks out there unless they want a little luxury at the expense of a few grams. I didn’t notice the weight difference from previous bladders at all.Absolutely thrilled and looking forward to more adventures with this awesome piece of gear.