You’ll Have to Pay in Blood. The Red Cross teamed up with “Peanuts” for an April blood drive, and a T-shirt promoting the campaign has become an unexpectedly hot commodity online.

It’s a white T-shirt that displays Joe Cool — the name of Snoopy’s alter ego that wears sunglasses — leaning on the Red Cross logo and text that reads, “Be cool. Give blood.” ...

It was a white T-shirt bearing the likeness of Snoopy wearing shades and leaning effortlessly against the iconic American Red Cross logo that prompted a surge in blood donations in the spring of ...