How good a diet does my compost bin get? Today's contributions included illy coffee grounds, helga's bread, celery, carrot & chai tea leaves. Plus a bucket full of general garden twigs & leaves to add to the carbon content. Apart from the last bit, the compost bin is eating really well, & it is all reducingas planned - I am soooo pleased! I'd better get some swanky compost out of it, the quality of stuff that I'm feeding it.