New GA State park - Don Carter. Underwhelming!!

CAN ANYONE TELL ME WHAT A "CHAR WOOD BUCKET" IS?

PS
I AM THE CAMPGROUND HOST AT DON CARTER SP.
FOR THOSE OF YOU WHO DON'T KNOW, THOSE "CHAR WOOD BUCKETS" ARE FOR LOW VOLUMN GREY WATER DUMPING. THE CHARCOAL FILTERS THE WATER BEFORE PERKING INTO THE GROUND. THEY ARE NOT FREE CHARCOAL AS SOME PEOPLE HAVE GUESSED.
THE TERM "CHAR WOOD BUCKET" WAS CREATED BY ANOTHER PERSON'S POST, AND IS NOT THE CORRECT NAME. IT IS DESIGNED FOR LOW VOLUMN GREY WATER ONLY. IT IS NOT DESIGNED TO DUMP HOLDING TANKS EITHER.