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I purchased this to use with invisalign with the hope of putting the braces and cleaning solution in a sealed container I could have in my purse as I am often on the go. I liked the idea of this case, but it was mostly a leaky awkward failure.The little tray that swivels so you can lift your aligners/mouthguard/other device out is a cool idea, but it's not always easy to work. Half the time I ended up dumping my aligners onto random public restroom surfaces while trying to get them out...yuck.As for watertight, there is a little rubber ring that is supposed to make the seal, but it doesn't like to stay in place. If I am very careful to check that it is sitting right and then screw it closed slowly, it seamed to seal one time in three. The container looks and feels sealed, right up until it's contents spill right out.

Was hoping to use this for travel - leaks IMMEDIATELY when placed on side.

A useful product, but unfortunately it does leak, no matter how tightly I screw the lid on to the container. Otherwise, it appears to be high-quality plastic, but just not leakproof as advertised.

Yes, it is true this isn’t 100% leak proof like other reviews have stated. To me that doesn’t matter at all. I personally made the switch to this container, as I was using a cup previously to clean my night guard, and it just wasn’t cutting it. I love that this closes securely, keeps the mouth guard submerged, and even has a convenient swivel removal system. Awesome and thoughtful design! Small enough to fit on my bathroom sink which I love

I bought this for a family member to use with their dental plates. He was REALLY happy with this! It closes tight and drains well, after a gentle shake to clean the partial.This company really needs to market it for dental partials, plates, retainers, etc! You would make a boatload of money!