My Yeti tumbler finally got to the point that I didn't trust it. It's been stained and messed up for a while (because I only use it for coffee). It lasted about 18 months of daily use.
I replaced it with an extremely similar Rtic tumbler a few days ago. It seems basically the same, though the lids are not compatible. The Rtic lids are just better than the HydroFlask lids.
BTW, if anyone actually has details on what happened between Yeti and Rtic, I'm all ears. The rep for them at my old store said something about a divorce. I'm pretty sure one of the parties was a complete dick, but I'm not sure which one.