It appears to be a nice functional design but mine leaked in my pack. I discovered the O-gasket seal in the cap moves out of position when tightened. I thought it was an isolated case but when the second flask did the same thing, I replaced it with a 16oz Nalgene HDPE narrow mouth screw top bottle & the problem went away.

It's a really nice flask to have. Great item to buy if your trying to just get enough for free shipping like me.

Took this guy camping a few times so far and have been pretty well impressed at how it's held up. Be advised; it's MUCH taller than the photo on here makes it out to be. Surprisingly taller to be honest. Holds a LOT of liquor. It cleans very well, (I agree with the below reviewer with the fact that the body of the flask doesn't hold a lot of odor, however the cap has a tendency to do so. I believe this might be because of the small gasket.) Speaking of that gasket, I would have rated this more stars than I did, but that little malleable gasket in the cap has separated and come loose. I expected that this would happen over time but was surprised at how quickly it came loose after two instances of "field" use.

Overall, while it does fill the bill and is useful, I'm thinking about trying another flask from a different manufacturer and moving this into more of a backup role for my camping kit.

Leakproof screw on top,durable and thin profile... and cheap! These don't hold odor at all really- They would if you left some booze in there for a month after your camping trip, but it's really nothing to worry about. I dropped a full one about 10 feet onto hard granite-- just a scratch. They are a little taller then the product photo would indicate- About 8" tall I'd guess w/o having it in front of me.