If you are talking a cup or so it makes no difference.
You can dispose of expired milk safely by pouring it down the toilet. You can also pour it down the drain, however, pour some vinegar down after it to get rid of the smell.
Personally, I pour the milk in after.
You can pour it down the sink or toilet. It shouldn't harm anything that way.
Rock salt helps to kill tree roots that may be growing in your sewer line.You should try flushing 2 cups a week down your toilet.
If there are urine stains in your toilet bowl, pour a generous amount of bleach into the toilet bowl and under the rim, then leave overnight. The next morning, flush the toilet and pour more bleach into the bowl and scrub with a toilet brush.
Get a one or two gallon bucket of water and pour it straight into your toilet. If the water goes down like a normal flush, your sewer line is fine and your toilet probably needs to be replaced or chemically treated.
You waste Coke
You waste Coke
milk
Pour it
Pour it out.
prepared milk is milk that has been pasturized