Contigo AutoSeal Thermal Mugs. They never spilled their contents, which I could never say about other thermal mugs. They keep everything warm/cold for a good amount of time. I'm just super happy with it, and it still holds up after 8 years of frequent, almost daily use.
We used to get these but over the years the newer designs got cheaper and less well designed. It looks like they still sell the old designs though, so that's nice.
I've got a contigo like that, had it for several years and while it's kind of a pita to clean the lid, it keeps stuff warm for several hours and doesn't spill at all.
Same here, they worked well for so many years. They’ve been slowly dwindling as kids lose lids and stuff, and I haven’t seen them in stores for.a lot of years