16-Ounce Coffee Flask with Flex Sip™ Lid

[This review was collected as part of a promotion.] I was so sad when I lost my 4 year old hydroflask this summer! It was the only travel mug I'd ever found that didn't leak coffee, so I used it every day, for years. I bought two new hydroflasks, even though they had this new lid design. One of the two lids was fine at first but started leaking after 3 weeks. I have now switched to using the second lid only, but this week i noticed a small amount along the seams when I tilted it for use. . i am so disappointed. My previous experience had been nothing but spectacular. Now I have two new expensive travel mugs as leaky as all the others I paid less for.

The leaking issue is from a thin clear gasket on the inside of the bottom portion of the lid that rests on the top of the cup. This is NOT the larger red/orange gasket on the inside of the disassembled lid. If you take the lid off, turn it upside down and look in, you will see a thin clear/opaque rubber gasket. When taking off the lid to fill the cup, it sometimes falls out. It's hard to see on the counter because it is clear. So when you fill your cup up, and screw the lid back on, if that little clear ring has fallen out on the counter or the floor, coffee will leak out between the the lid and the rim of the coffee cup (no matter how tight you have screwed the lid back on. As long as I am careful to watch for this and put it back in when it falls out, there are no leaking problems.

[This review was collected as part of a promotion.] After I several accidents with spilled coffee, I purchased my first Coffee with Flex Sip Lid some years ago. I liked it so much that I recently bought a second. The second lid is looser than the first, but after one week, it still seems leak-proof.