How exactly does it work? I should put it inside the backpack? Can it be used in any kind of backpack?

Hi, dear customer. Thank you for your question. This is Amanda here to serve you. About our hydration bladder, we have attached detailed instruction on our package for you to quick start on using hydration bladder. Here is the instruction for you. 1.Open the cover by counter-clockwise, and close it by clockwise. 2.Gently bite and pull the tip of the valve with front teeth and push back to stop water flow . 3.For the best results,please do not bit hard or chew on the valve. 4.Please cover the valve when not in use. About your other question,our L 14.2'' x W 6.8'' Hydration bladder is compatible with most hydration packs. When they hydration bladder is empty, it can be folded .So it won’t occupy much room in your backpack. The tube (0.4” diameter, 40” long) provides a wholesome flow for easy drinking, keeping you hydrated when biking, cycling, hiking, or running! You will love this hydration bladder when you get it. Please feel free to write to us if you have any more questions, we are here to serve you all the year around. Regards.

How do you recommend this being washed? I just received this today

Hot water and 2 tablespoons of baking soda.

With such a big lid for filling, how are you to get the full 2 liter's in? Is it 2 liter's starting under filling lid?

I found no way to successfully fill this bladder with 2 liters of water without a bunch of it spilling out when you screw down the cap. Another reviewer reported capacity at 1.6 liters.

Any way I can order a longer tube? I would like to use this while motorcycle riding

I have not found a specific one but you could us aquarium tubing of the same diameter

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💦 Stay cool, sip smart, and never miss a beat with CHERAINTI’s hydration game-changer!

FLOW ON DEMAND - High-flow bite valve with ON/OFF control and dust cover lets you sip easily and hygienically on the move.
HYDRATE LIKE A PRO - 3L large capacity keeps you fueled through long hikes, rides, and runs without constant refills.
ICE READY WIDE MOUTH - Extra-large opening lets you add ice cubes or clean effortlessly—no more funky tastes or hard-to-reach spots.
LEAKPROOF CONFIDENCE - Double sealing side tech and pressure-tested design ensure zero leaks, so you stay dry and worry-free.
UNIVERSAL FIT DURABLE - Compatible with most hydration packs, made from premium BPA-free TPU that resists temperature swings and wear.

The CHERAINTI 3L Hydration Bladder combines premium BPA-free TPU material with a wide-mouth design for easy cleaning and ice insertion. Featuring a double-sealed, pressure-tolerant construction and a high-flow bite valve with an ON/OFF valve and dust cover, it ensures leak-proof, hygienic hydration. Compatible with most packs and temperature-resistant from 20°C to 50°C, it’s engineered for active professionals who demand reliable hydration on the go.

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HK$522

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Hong Kongstore

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Product dimensions	19.3W x 42.9H centimetres
Strap type	Adjustable
Capacity	3 litres
Pocket description	Utility Pocket
Tank volume	3 Litres
Manufacturer	CHERAINTI
Color	3L -Water Bladder-Military Green
Size	3L US
Material type	Thermoplastic Polyurethane (TPU)
Number of items	1
Batteries included?	No
Item model number	Hydration bladder 3L
ASIN	B0BJ6RWR6L

Electronics GVIUM-ASOH-220

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