Caribou Coffee has an endless mug for $39.99 that gives you free coffee or tea now through April 30, 2018.
“Earth Day tumblers are now available in stores and online! Fill it right away, all day, every day, starting now through April 30th.
You can fill your tumbler with unlimited free brewed coffee or hot tea. Or, with $3 mochas, lattes and signature drinks! ” the chain said in their announcement. You can order yours at Caribou Tumblers.
Caribou announced the Earth Day special on the Caribou Facebook Page.