Stanley partnered with Barbie to release eight 40-ounce Quenchers inspired by the doll's 65th anniversary. Here's how to get two new styles that dropped today.

Stanley cups fit in car cup holders despite their large size and have a straw that makes staying hydrated just a little more fun. The viral version of the Stanley cup is the 40-ounce model, likely because drinking two of them almost equals the suggested daily water intake for women, taking the guesswork out of drinking enough water each day.

A breakdown of the Barbie x Stanley collection rollout from Sept. 16 through Sept. 20, and how to purchase the viral 40-ounce Quencher cups online.