SAVE $13.98: The 40-ounce Hydro Flask Travel Tumbler in pink Valentine's Day shades ... The Hyrdro Flask comes with an ergonomically-designed handle and a leak-resistant lid with flexible straw.

Both cups also feature a comfortable handle of roughly the same size. Both Stanley and Hydro Flask say their 4o-oz tumblers "will comfortably fit most car and truck cupholders." I tested both out ...