I pour it into a milk carton, close the top of the carton, and put in the trash can.
If you put it into a container that you're afraid will let it leak out of the trash can, put it in the refrigerator so that the oil solidifies. Then take it out on trash day. (Put a note on the trash can to remind you so it doesn't sit in the fridge for weeks!
Mama to a boy EnviroKid
10 years old and a little girl EnviroBaby
I write about parenting, environment, cooking, and more.