Good news ye crafty types: the Kunin Group makes craft felt from Ecospun-brand fiber, made exclusively from recycled PET bottles. That's the #1 plastic most associated with soft-drink bottles. The fiber comes from the Foss Manufacturing Company, a United States mill that has remained in business by going after niche markets. (They also make fleece for clothing which might also be popular this time of year.)
A US-made product made of recovered materials? What's not to love? I'm going to have to get some (JoAnn Fabric sells it) if I ever make a flannelgraph set-up for teaching.