I'm going to say, for saving money, Ozark Trail from Walmart cannot be beat. I've even seen videos and articles putting them head to head against Yeti and coming out the same or better, never worse. Yeti is overpriced as there is nothing whatsoever special about them other than the name and maybe some fancy design work. A double walled vacuum container is the same regardless of whose name is on it.
I've used their mugs for years and have never once been disappointed. I've had drinks where half or more of the mug was ice and still came back to being ice cold with some ice left the next day. The lids are cheap so if you lose or break one or too much oil gets built up, replacing it will not break the bank. Some of the name brands sell the exact same lid for more than an entire Ozark Trail mug goes for. Don't fall for their shenanigans.