I'm using these for compost that is brought to town bins for collection. Most important - They are sturdy and don't leak (as long as you don't pour liquids in). Coffee grounds and wet filters are fine, as are cooked leftovers and other wet items.The bags have marked, serrated, tear-off lines between them, but I've been cutting them with scissors to avoid tearing the sealed seam of the next bag on the roll. Perfect size for countertop or small floor bins (the ones that use grocery bags with handles).I've been self-tying the bags shut when not quite full, and the tie is strong enough to use as a handle.don't hesitate to buy these.