"Fat trappers"
These are an excellent way to trap and dispose of the fat used when cooking. Before I bought these I would leave fat to, hopefully, congeal in a mug or similar container and then throw that away but this only works when it does congeal and not when simply using oil to cook with. The fat trappers soak up everything, including oil and you can just throw them in the bin. They obviously stop "fat bergs" in the drains.