Burger King just started selling a $1 Donation coupon book. It has 4 coupons for free items: 4 nuggets, small fountain drinks, small fry, and small soft serve.
This works out to 25 cents per item. I think this is a good deal although small. Expired January 3, 2025.
It kind of competes with Wendy's Boo Books that have coupons for free Frostys.