Separating Plastic Drinking Cups

I heard of a similar problem, but with a commode and a cup.
It was solved by placing ice cubes in the cup and when the cup shrank from the cold, it was removed from it's wedged location. I ought to add that at this point in time, it was in the backyard.

You might also try filling up a sink with water and putting the stuck cups under the water level for a minute. Sometimes if the water gets between the two, it separates. Even try the trick with the ice cubes before the water bath.
Another thing that might work is putting your thumb on one of the cups and your middle finger on the other. Push in alternate directions (even try that under water)

try getting a better grip with rubber/latex gloves with dry cups ....twist. Or hot water on outside cup..ice in the inside cup. good luck!

Hello I'm a nanny and my boss stacked about 5 plastic cups inside each other and now they won't come off. We have tried hot water cold water, soap and nothing works... Any Ideas? Thanks Geovanna V.

Put the in the freezer overnight, then put them in your dryer with a blanket for s few min.

There is a simple solution fill the inside cup full of ice then wait a few minutes turn on the hot tap water and let the hot water run around the outside glass. Immediately and very easily the cups will come apart. Just a little science used there!

Thank you, thank you, thank you! I can't say it enough times! It worked! Very easily! (The ice in the top cup and then fill up the sink and put the bottom of the outside cup in the hot water and voila!)

OMG! It worked! I am doing a happy dance right now because I have been trying and trying to separate these two cups all day. I think I even pulled a muscle trying to pry them apart! So happy!

I did this with a plastic margarita shaker top. Used plastic wrap to prevent ice cube water from leaking from the lid into the top cup and ran hot water around top cup. Still had to use a flat head screwdriver to pry apart, but at least it worked! Thank you, science.

Gotta love the Internet:) Filled the top cup with ice water, dipped the bottom cup in boiling H20 that was on my stove top and wallah took all of ten seconds. Thank you for the knowledge of others, you make my life simpler.

Worked like a charm! My wife bought two nice cups for a great price, because they were stuck together. Took the advice from here, put ice and cold water in the cup, placed it in hot water and voila! Thank you so much.

If there's any gap between the two tumbler lips, trickle warm water into that area. The water may act as a buffer and lubricant. Wiggle the two tumblers in opposing directions. You could also submerge the two tumblers in warm water (dishwater worked for me,) and try this same technique.