We got out Vitamix S30 a few months ago and generally have been happy. We have 2 of the travel containers and one is great and the other is awful! The double insulation has let in moisture in one of them and we can't seem to get the moisture out, and it's developing a mildewy smell (EW!) Contacting Customer Service to get a replacement, but our other one hasn't had the same issues. Weird!

Separately, the mugs are HUGE, and therefore don't fit in our cupholder easily. We also have wide straws that we used with our previous travel containers but they fall in to this jar when I put the lids on. I end up having to use without the lids if I want to use the straws, which is annoying.

As others have noted, the lids are super hard to get off.