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KICK-SS's Photo KICK-SS Posts: 9,557
5/5/13 9:06 P

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Absolutely, especially things with fats and sugar in them in particular.

You always need to let something sit a couple minutes before you eat it so the heat can distribute through it..

Microwaves are wonderful things, but one needs to use a little caution when using them, sometimes unexpected happens. The OTR (over the range) ones too, because of the way you have to take things out - not as easy as when they're on the counter top or built in lower.

Edited by: KICK-SS at: 5/5/2013 (21:07)
Betty

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GEORGE815's Photo GEORGE815 Posts: 37,217
5/5/13 5:26 P

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Great sippy cup. Microwave oven can sure superheat food and liquid. Nothing like adding something to a liquid from the microwave and it boils over. Drinking it right out of the oven is taster beware! When the cup is hot to touch, beware!

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-SHAWN-'s Photo -SHAWN- Posts: 25,246
5/5/13 1:00 A

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KICK-SS's Photo KICK-SS Posts: 9,557
5/4/13 11:37 P

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Shawn, Sorry - a little grammatical error there!!

I hate to "burst a bubble" but in my microwave when the water comes to a boil, it bubbles just like it does on the stove. But yes, you don't want to dump something into the container. I've never had it "explode" when I've moved the container though. Maybe a difference in wattage or something? I think mine is 950 watts, it's an otr microwave/convection (Jennair). Not as high powered as some of them are.

By the way, I like your sippy cup!!

Edited by: KICK-SS at: 5/4/2013 (23:38)
Betty

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-SHAWN-'s Photo -SHAWN- Posts: 25,246
5/4/13 4:08 P

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Betty,

"I be sure and stir it before I try and pour it, that way the bubbles stir down."

The microwaved water gets hotter/past the boiling point and there ARE NO BUBBLES.

The moment you joggle the container or put something into it, the water explodes. That's what happened to me.

There are no bubbles to "stir down" in regards to this particular issue.

MORTICIAADDAMS's Photo MORTICIAADDAMS SparkPoints: (282,848)
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5/4/13 12:33 P

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My husband had problems with boiling water in the microwave once. I don't heat water to boiling in it.

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KICK-SS's Photo KICK-SS Posts: 9,557
5/3/13 8:12 P

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I always boil water in my microwave, however when I take it out, I be sure and stir it before I try and pour it, that way the bubbles stir down.

One should always let things sit for a couple minutes after cooking (veggies, for instance) in the microwave so the heat has a chance to get distributed better. Most packages of food, plus micorwave book instructions advise this as well. It is good advice too!

Betty

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GEORGE815's Photo GEORGE815 Posts: 37,217
5/2/13 8:44 P

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Wow! I usually warm up brewed coffee in the microwave oven. Usually set the timer for 90 seconds. Lot of energy in that microwave oven for sure. It gets things very hot. But on the other hand, the heat is contained though. Ever let your microed veggies set just a little before you scarf them up. Nothing like a cold piece of asparagus or a cold carrot.

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UNICORN212's Photo UNICORN212 Posts: 9,154
5/2/13 7:53 P

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I have known this for several years. You just need to use common sense and not overdo it.

~Nancy

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-LINDA_S's Photo -LINDA_S Posts: 4,144
5/2/13 3:38 P

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Wow, that's awful! I hope knowing this can happen will help lots of people. Personally, I try to minimize microwave use, so it's been ages since I've heated water in it. I like the control I have with my teakettle, and it doesn't take long.

Linda

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KIERAE's Photo KIERAE SparkPoints: (177,652)
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5/2/13 2:01 P

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I have seen this happen when boiling water in a cup for tea. IE put the tea bag in and have it "explode". Got to be very careful!

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-SHAWN-'s Photo -SHAWN- Posts: 25,246
5/2/13 1:16 P

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This happened to me a few weeks ago, now I know why. I was watching the 4 cup measuring cup as I went to grab it,I saw the non-boiling water explode with my hand still in the microwave.

I still boil water in the microwave, however now I keep a small wooden spoon next to it :-)

Edited by: -SHAWN- at: 5/2/2013 (13:20)
MARIBETHKC's Photo MARIBETHKC Posts: 884
5/2/13 1:02 P

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Wow - this is really something to be aware of. I do often boil water in the microwave, but usually less than 2 minutes for a cup. emoticon

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-SHAWN-'s Photo -SHAWN- Posts: 25,246
5/2/13 12:44 P

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A 26-year old man decided to have a cup of coffee. He took a cup of water and put it in the microwave to heat it up (something that he had done numerous times before). I am not sure how long he set the timer for, but he wanted to bring the water to a boil. When the timer shut the oven off, he removed the cup from the oven. As he looked into the cup, he noted that the water was not boiling, but suddenly the water in the cup 'blew up' into his face. The cup remained intact until he threw it out of his hand, but all the water had flown out into his face due to the build-up of energy. His whole face is blistered and he has 1st and 2nd degree burns to his face which may leave scarring.

He also may have lost partial sight in his left eye. While at the hospital, the doctor who was attending to him stated that this is a fairly common occurrence and water (alone) should never be heated in a microwave oven. If water is heated in this manner, something should be placed in the cup to diffuse the energy such as a wooden stir stick, tea bag, etc, (nothing metal).

General Electric's Response:

Thanks for contacting us; I will be happy to assist you. The e-mail that you received is correct. Microwaved water and other liquids do not always bubble when they reach boiling point. They can actually get superheated and not bubble at all. The superheated liquid will bubble up out of the cup when it is moved or when something like a spoon or tea bag is put into it.

To prevent this from happening and causing injury, do not heat any liquid for more than two minutes per cup. After heating, let the cup stand in the microwave for thirty seconds before moving it or adding anything into it.

Here is what a local high school science teacher had to say on the matter: 'Thanks for the microwave warning. I have seen this happen before. It is caused by a phenomenon known as super heating. It can occur any time water is heated and will particularly occur if the vessel that the water is heated in is new, or when heating a small amount of water (less than half a cup).

The water heats faster than the vapor bubbles can form. If the cup is very new, then it is unlikely to have small surface scratches inside it that provide a place for the bubbles to form. As the bubbles cannot form and release some of the heat that has built up, the liquid does not boil, and the liquid continues to heat up well past its boiling point.

What then usually happens is that the liquid is bumped or jarred, which is just enough of a shock to cause the bubbles to rapidly form and expel the hot liquid? The rapid formation of bubbles is also why a carbonated beverage spews when opened after having been shaken.


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