RTIC 30 oz Stainless Steel Tumbler Cup

I bought a 20 ounce Yeti first and have used it for a couple months. I really liked it, but wanted a bigger tumbler. I didn't want to pay $39.99 for the 30 ounce Yeti. I researched the RTIC and saw it had great reviews. Most people said it had similar comparison when put up against the Yeti and at $19.99-24.99 it was a better deal. I bought it and really like the bigger size. I filled both my Yeti and RTIC with ice water and left them over night. I forgot to check them in the morning, but when I got home from work that day, the Yeti still had a very small amount of ice and the RTIC had only ice cold water. I'm sure the size difference between the 20 and 30 ounce made the small difference. So for me, the price difference made the big difference. I plan to buy a couple more RTIC tumblers, because I can't justify the extra money for the Yeti. Follow Up: I've owned the RTIC Tumbler for a couple months now. I've found that the black rubber gasket that seals the lid eventually begins to disintegrate after a couple months. Black particals begin to fall into your drink. I've never put this lid in the dish washer and have always gently hand washed it with dish soap. I've contacted RTIC to see if they would send me another lid or at least a new gasket, but was rudely told by a customer service representative that I needed to contact the seller on Amazon to have them deal with the problem. Are you kidding me? I've bought three tumblers and told everyone I know how great this product is and this is how RTIC deals with a small customer service problem. I'll move on to another company and never buy another RTIC product. All this over a 5 cent gasket.