Stanley partnered with Barbie on eight 40-ounce Quenchers inspired by the doll's 65th anniversary. Here's how to shop the tumblers, which are all available now.

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.

In honor of the doll's 65th anniversary, Stanley is releasing eight new Barbie-themed versions of their viral Quencher tumbler - here's how to get these limited-edition cups before they sell out