Review on RevX Thermal Hydration Backpack with 2L BPA Free Bladder - Keep Liquids Cool for Hours - Perfect for Hiking, OCR, Cycling, Camping, MTB by Khalil Hopp

Bought this backpack for hiking. I hate lugging around a water bottle and this backpack is small and not bulky but I can also keep my keys, phone, wallet and camera in here. I've never had a hydration pack, so maybe it's intuitive to those (it took me a few minutes to figure out) that to drink you have to pull out the mouthpiece and bite down on the silicone before using it...like a Drinking straw.