I was caught off guard by the fact it just had a hole in the cap top. studying designs further, I found that that indeed is the gist of what the canteen top has. mostly, I was expecting some sort of system that would only allow water flow if a specialized drinking tube like that found on the Czech m10 was inserted. I really is decent quality, but just wasn't what I was expecting.

Works fantastic with the gas mask drinking tubes sold here too. Canteen is made of thin plastic, allowing you to fold it a little so it takes up less space in a bag. While that is a positive, I'm a little wary of the longevity of this product because of that fact. If it were full of water and fell on a sharp rock, it could certainly puncture. Other than that, excellent product.

You can put this in a regular canteen holder and use it like that or attach it to a gas mask. I think they're really cool and you don't see them too often. I picked a couple up because they are pretty good price for the quality.

Works great, also can be used as a regular canteen. The hole in the top is the perfect size for the gas mask drinking tube

I'm so glad I got this. I love wearing my gas mask simply because it looks cool, but I get thirsty in there. This along with the drinking tube has solved that problem!

The canteen is brand new, un used condition and works perfectly as expected, great deal, great product, shipped out right away.

Thick and durable!! Love these I have two!!

Another must have. Excellent price and excellent quality.

I got enough for every mask and a few extras and make sure and get the drinking tubes to go with them. These canteens are light weight and fit in standard canteen covers. If you do not have canteens with drinking tubes that are compatible with your mask, you will not be able to safely drink. The canteen can be used for regular camping activities with our the tube.

If you have ever worn a gas mask for any length of time, you know how important it is to stay hydrated. These were invented for a reason and this is one of the best prices I've found. I bought one for each mask we have.