I've had the tumbler with the glass insert for over a year and it's my favorite tumbler by a landslide. Comes with me on vacation, it's my summer camping cup, and I use it at home all the time. It's so nice to be able to use the glass insert for wine, then be able to reuse the tumbler without the insert for other drinks. I don't know why it took me so long to buy replacement glass inserts, it's a no brainer! Now I can keep one in the freezer for REALLY cold wine/beer.