The Purist Mover is the closest thing to a “premium” water bottle that I’ve tried, with a clean, minimalist stainless steel aesthetic and a satisfying textured finish. Its biggest hook, though, is the ultra-thin layer of glass that lines its interior. Apart from insulating your drink all day, this is designed to keep fluids from gaining a metallic taste or unwanted odors as quickly as they might with other bottles. The whole thing will still need washing every so often, but in my experience, this has actually worked.
The Mover is an 18oz bottle, but there are different size and lid options to choose from (the “Union” spout top is my preference, though it can be somewhat noisy, if that matters). No Purist bottle is especially cheap, but it should make hydrating a little more convenient for your teacher’s day-to-day, on top of providing a nicer piece of design for their desk. — J.D.