This tumbler has all the same features as the Stanley…it’s insulated, has a screw-on lid to keep it sealed tight, there is a lever on the top of the lid that flips around to close the lid or give you to option to use a straw or just drink out of the lid opening, and has an ergonomic handle. AND it fits in the car cupholder! I filled it half with ice and half with water and left it on the counter and there was still ice and cold water in it after 15 hours. I turned it upside down to see if it was leak-proof, and it only dripped slightly out the straw opening. The lever on the lid that flips around to open or close it pops out for easy washing. The one thing that disappointed me is that the straw that came with it is slightly bent, but I have tons of re-usable straws that will fit in it.
Overall, I am happy with this “dupe” that cost half the price of the Stanley!