Stanley Quencher H2.0 Flowstate Tumbler - 40 oz. vs 30 oz. in the color “Polar Swirl” I like the smaller 30 oz size if I’m on the go, for a slightly more petite-friendly option, but less trips to refill water with the 40oz! wanted to show the two side by side for comparison. LTKunder50 LTKFind LTKfamily