Review on 🏃 Hydrapak Velocity IT Insulated Water Bladder/Reservoir - Running Hydration Vests, 1.5-Liter (50 oz.), Reversible for Effortless Cleaning, Safety & Dependability by Meech Elliott

Definitely keeps drinks cooler longer. The tube is delivered without a drinking cap. Also, liquids entering the tubing heat up and can be drawn back into the bag. When you blow into the tube to remove liquid from the tube, you heat the air in the bag and heat the liquid. Can't tell how much is in the bag but otherwise a good buy. I'm glad I bought it. Have an insulated option that comes with a drinking cap. An insulated hose doesn't cool the fluid in the hose much better, so I wouldn't bother with that.