A new kind of Coke quietly hit US store shelves earlier this month. 

Four varieties, including Coke Energy, Coke Energy Zero Sugar, Coke Energy Cherry and Coke Energy Cherry Zero Sugar, recently reached US retail shelves. The Coke-energy-drink hybrid beverage became available in international markets last year. 

Coke Energy, which is made with guarana extracts and B-vitamins, has 114 mg of caffeine per 12-ounce serving. A 12-ounce can of regular Coke has about 34 mg of caffeine. But the two products should taste about the same.

It may seem like an unusual drink, but it’s an important part of Coke’s strategy: Coca-Cola has been diversifying its portfolio of beverages while innovating its core product. 

So far, the product may have flown under the radar. But Coke is planning a splashy US rollout for the drink. 

To ensure Americans are aware of the energy drink, Coca-Cola is advertising the product during the Super Bowl. It also plans to offer samples across the country.