Starbucks cold foam or its delicious sweet cream -- which should you choose? Well, it depends on what you're looking for as the two are quite different.

If you're a Starbucks fan and were looking to try the company's cold foam, you can do so for free this week. The coffee chain announced Starbucks Rewards members in the U.S. and Canada can add cold foam to a cold beverage for free May 7-11.

Starbucks cold foam fans are in for a frothy treat. The coffee chain is letting rewards members add cold foam to its cold drinks for free from Wednesday, May 7, through Sunday, May 11. And the brand’s Cold Foam Days celebration doesn’t end there. It’s also introducing a fresh flavor of the popular add-on.