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Old Today, 11:33 AM   #1
Scalded Dog

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Separation issues... can you help me?

The attached image shows two hard plastic drinking cups. Each is about eight inches tall, and the two cups are nested. They were washed, then dried, and placed in to the cup cabinet.

However, NOW they refuse to separate.

I have tugged and pulled and cursed. I have tried squeezing the inside cup's mouth into one "oval," while squeezing the other in a perpendicular oval.

I tried filling the inner one with ice water, while simultaneously resting the outer one in hot water.

I introduced oil in between their surfaces. I tried introducing water. Now, there only seems to be a vacuum seal that has been produced by the introduction of liquids.

I have used sharp metal tools to attempt prying and lifting, "walking" the inner cup out of its prison.

None of these have worked.

Of course, I could crush/ destroy one cup in order to free the other... that's no fun.

Any ideas on how to separate these two, and finish with two still- usable cups?
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Old Today, 11:52 AM   #2

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Sounds like suction is the problem. They were maybe fresh out of the dishwasher (hot) when they were put together and now they are stuck? Try sticking them in the freezer for a few hours and see if that works. If not, stick em back in the dishwasher then try to take them apart when they are hot.
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Old Today, 04:42 PM   #3

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A shotgun would separate them, that would be fun!
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Old Today, 05:10 PM   #4
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When warm, moist air cools it exerts less pressure (ie, causes a partial vacuum). Dunk them in some hot water for a while and the trapped air should get back to normal pressure.
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Old Today, 05:19 PM   #5
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Drill a hole in the bottom one that will break the vacuum and when you want to use just place it inside the cup without the hole drilled in the bottom
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