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As far as I know oil is ok. It's liquid even when cold. But lard or grease will clump in cold water.
The best thing to do is save your used grease in a can and put it in the compost or garbage bin
Alternative : save your grease in a jar and heat it up and pour it down the sink the moment your slumlord increases your rent and prices you out of the building.
I use Ghee or Tallow when cooking. Both are solid at room temperature. I wait for the left over grease to cool down, and wipe it up with a paper towel. Easy peasy.
Bacon grease is a good example of something you freeze in an old can to throw away.
Can also be used to make homemade fire starter if you're going camping. Mix it with wood pulp till you get a dry paste.