Just bought an additional one and felt like sharing somewhere.
this post was submitted on 19 Jun 2026
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I noticed in the comments everyone really likes them, but this is not my experience.
True, no leakage. Mine, I got it at least 6 years bacl, never put in a dishwasher and it's as good as new. But whenever I used it for a hot beverage, everything turns bad in it so much faster than anywhere else. Initially I thought I was not cleaning it well enough. I cut a sponge to reach everywhere and I was doing it daily, with the thingy lifted like in the last picture. I concluded it's not that. It's like the perfect conditions are created for new life to appear in it.
I still use it all the time, but only for water. Which also turns bad, but at least it can hold for a day or something, depending if it is room temp or cold.
Just a guess as to what's going on, but the optimum temperature for drinking hot beverages overlaps pretty exactly with the optimum temperature for microbial growth, so if these are better at retaining heat than the comparisons they would also spoil faster
If I leave left over coffee (especially with milk) in there over night or the weekend it may say hello the next time I open it. For cleaning the cap the dishwasher seems to be the only option, cleaning by hand is very difficult.
Contigo makes cold only ones too, maybe you got one of those?