【ODORLESS MATERIAL, INSULATED TUBE】The material is smooth inside and able to keep water clean. The water bladder has superior quality TPU drinking tube with no odor. An insulating sleeve is added to reduce the temperature change of the water flow that running thru the tube from hydration reservoir.

【BIG OPENING FOR EASY FILLING AND CLEANING】The 2 liter hydration bladder opening mouth is large enough so you can fill/refill water very easily even without taking it out of hydration backpack. You can also put some ice cubes into water hydration bladder to keep water cool. The big opening allows you reach every corner inside and give your water reservoir bladder thoroughly cleaning. So you can always maintain your drinking water bladder at high hygiene.

【MULTI FUNCTIONS】The hydration reservoir is suitable for most hydration backpacks. Water bladder bag helps you stay hydrated in outdoor activities: running, skiing, hiking, riding, camping, cycling, climbing, bicycling, etc. It is a must buy for outdoor adventure enthusiasts and a great gift for Christmas/New Year. 

• Insulated drinking tube and shut-off bite valve
• Large, wide opening for ease in cleaning
• BPA Free
• Neoprene sleeved-insulated tubing
• Large molded handle for ease in insertion & removal