Add me to the list of those that love Tervis tumblers. I've had some 10+ years, I never put them in the dishwasher and mine aren't etched/scratched.
If you live near a Bed Bath and Beyond, I've purchased several on their clearance tables. I look every time I'm in the store and have found some really fun designs at upwards of 70% off then using a 20% off coupon they are practically giving them away.