Badvertising Candidate? I Don’t Get It.

Can someone explain this headline to me?

I saw a small billboard over a train stairway today. It was for Dove Massage Beads. There was a picture of a bottle of Dove Massage Beads in the bottom right corner, with 50 or more purple spheres of various sizes arrayed over the ad. The purple spheres presumably represent beads of soap that massage your body.

The headline on the ad read:

One massage bead for every vanilla latte you've worn

Huh?