Boulder Flask, Shatter-Resistant, Leakproof Hip Flask with Clear Body & Silicone Grip, BPA-Free Bottle for Hiking, Camping & Travel

This is the best plastic flask I have bought. Highly recommend for the use and the durability. No leak, easy to unscrew the top and easy fill. Fits perfectly in a jacket pocket and not detectable with metal detectors (wink,wink).

Great flask for the beach

I got this to carry water with me in a small daypack or sling bag along with other daily essentials. While the flat design makes it very easy to pack in either bag, the rubber bumper that goes around the outside grabs on to my backpack when I’m trying to push the bottle down one of side pouches. It isn’t a big deal, but worth noting. It slips in and out of my sling bags with ease, and the size is just right for my purposes. The cap screws down securely and the bottle does not leak, it is clearly built quite tough, and being able to see through the smoke side makes it really easy to keep tabs on remaining water. One nice thing is that it doesn’t look too much like a hip flask, so drinking from it in public doesn’t feel weird, and it just looks like you’re drinking from a small water bottle. So far I’ve been very happy with it and would recommend it hands down.

Rugged and reliable. Easy to seal and keeps its seal. Good size for various activities. The only drawback is that it is a bit difficult to clean and dry out.

This is my favorite water bottle for traveling. It holds 16 oz of water, is lightweight, has a rubber bumper so it can handle a fall, the lid is attached (so you can't lose it) and it fits anywhere without bulking out your pack. It is not the most stable thing out there - but if I'm not actively drinking from it, I'm fine with closing the lid so it can lie flat or get stashed (I haven't had any trouble with leaks at all, and this thing has been across the country multiple times). It's not dishwasher safe, but since I don't usually have access to my dishwasher when I'm traveling, I'm OK with that.

Lightweight. High quality. Well-designed lid. Transparent walls make it easy to fill and see the volume.

Driving down the road at 55 mph I hear a thump. Looking in my rear view mirror I see something tumbling down the middle of the road behind me. Suddenly I remember setting my flask on top of my car before leaving home. I turn around to retrieve the flask overjoyed to discover that it only suffered a bit of stuffing on the screw cap. This thing really is shatter resistant! Perfect size for those 3 -4 mile walks. Fits nicely in a pocket.

Leak proof, like the visual, excellent cap stabilizer