I have two tumblers still in use, given to us as a welcome to FL gift, in 1971. Have a set of 8, got in 1990. You can't beat them. Oh you can buy the cheap ones, but if they break, you'll have to buy new. Tervis you can replace, for us would be no big deal at 20 mile down the road.
They have all kinds, short, tall, handles and most any kind of logo you desire. They DO stand by their warranty but have never had a problem with any of ours. It's all we ever used poolside. Also, I put them in the dishwasher. I kind of laugh when I think about the 2 plastic thermo glasses that have lasted 44 years. Expensive, well guess not very if one considers how long they have lasted. Just good old made in America product.