Red Cup Day has become an unofficial holiday tradition celebrated by Starbucks enthusiasts. When is it and how to get yours?

The unofficial holiday observed by Starbucks customers is almost here. Red Cup Day is tomorrow, here's what to know ahead of time

Customers who return to Starbucks with the custom cup, or any reusable cup, will receive a 10-cent discount on their order and Starbucks Rewards members can earn 25 stars when they bring back their reusable red cup for future orders.