1. Paper bags
Paper bags can release toxins that can potentially catch fire.
2. Take-out containers
If the container has any metal, don't put it in the microwave! Metal can easily catch fire in the microwave -- and cause serious damage.
3. Yogurt & butter containers
Plastic containers like yogurt cups and butter containers are meant for one-time use. They aren't made to withstand the high temperatures and heat of a microwave, and if heated they can melt and potentially release chemicals into the food.
4. Eggs
If you want to make hard-boiled eggs, boil them in a pot on the stove. Putting eggs in the microwave will likely just leave you with a huge mess -- after the high temperatures cause them to explode.
5. Styrofoam
This is one of those things people like to test -- thinking, "if I just put it in for a few seconds, it'll be fine..." Nope, don't do it!
Styrofoam cups, bowls, take-out containers -- whatever the type, don't put it in the microwave. Styrofoam is a type of plastic, which doesn't mix well with microwave temperatures.
6. Grapes
They will explode and could catch on fire.
7. Cookware with metal trim
You may have plates or bowls with a pretty metal trim -- and when it comes to whether you should put them in the microwave, remember the word metal. That's a red flag for do not put in microwave!
8. Sauce or dip without a cover
Talk about a mess... Putting any type of sauce or dip in the microwave without a cover (even just a paper towel) will just end up leaving a HUGE mess.
9. Plastic storage containers
Again, the keyword being plastic -- meaning, do not put in the microwave! Certain Tupperware-type plastic containers will have a label if they are microwave safe. If you don't see that label, check the manufacturer's website -- or to be on the safe side, just don't microwave it.
10. Hot peppers
First, they can catch fire. Second, when you open the microwave, the heat can cause the peppers to release chemicals that can burn your eyes -- which sounds great to absolutely no one.
