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.

Barbie and Stanley have collaborated in honor of Barbie’s 65th Anniversary with eight new Barbie-themed Stanley Quencher tumblers, but only limited quantities are available. Today’s drop includes the release of the Barbie x Stanley ‘70s Superstar and ‘80s Dynamite 40-ounce Quenchers now available for purchase.