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InstaCool Cup: DIY Insulated Plastic Cup

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Picture of InstaCool Cup: DIY Insulated Plastic Cup

For a while now, I've been watching one of our Eureka Factory partners walking around with drinks in doubled up plastic cups, separated by a folded up paper towel. When I inquired, he said it was his DIY insulated cup. If you follow our Instructables group, you may wonder why he wasn't using one of the dozens of drink cozies we found jammed in that drawer.

One, the cozies don't work well with the plastic cups we use and two, we've now repurposed most of our cozies for more important things like shoe inserts and mouse pads. Go figure.

At any rate, while I know the basics of insulation - that air pockets slow heat transfer - I wasn't convinced that the tiny wall with the paper towel air cells between two plastic cups, made any significant difference.

So I decided to test the theory out - and by golly, you were right, honey, it does make a difference!

Step 1: Materials

Picture of Materials

2 plastic cups

paper towel or napkins

sfaust24 years ago
awesome 'ible, it's winter here in oz but this goes in the favorite list for summer!

We in the northern hemisphere apologize for conducting our summer business at such an illogical time for our friends down under. LOL

EurekaFactory (author)  sfaust24 years ago

Glad you liked it! We'll look for a pic back here in December then! :-)

joseph074 years ago
Great 'Ible! I used a foam cup in the inside and it made it even colder!

you are right

EurekaFactory (author)  joseph074 years ago
I'll bet! That's a great idea. Thanks for sharing!
Uncle Kudzu4 years ago

Brilliant! If I ever find myself without my trusty double wall mason jar I'll know how to improvise.

EurekaFactory (author)  Uncle Kudzu4 years ago
:-)

Clever. Well done.

bethmwl2 years ago

Great project, simple too. I should keep a set in my vehicle. I like the non-condensation very much too.

Freakyfoam2 years ago

Good 'ible. I just posted one that goes a little further and saw yours after I published mine (this one was a link on the right side since it was a similar project). Check it out: https://www.instructables.com/id/Keep-Your-Beer-or-Other-Drink-Cold/

bethmwl2 years ago

Grand idea, hope I remember for our summer gatherings

LiveCrafts4 years ago

Love this!! This is epic! You got my vote! ;D

messageme864 years ago

that was a brilliant idea. and was so helpful.. and gng to try it soon ,,, thx for sharing

wobbler4 years ago

This also looks like a good idea to stop cheap plastic coffee cups
burning when you hold them and should also have the added side effect of
making the damn things a bit more rigid. Also, as you're not actually touching the rim of the second outer one, you could just use any pre-used cup.

EurekaFactory (author)  wobbler4 years ago
Good points! I really like the idea of using a used cup for the outer insulator. Extra reuse points on that one!
jiaotashidi4 years ago

it is good

EurekaFactory (author) 4 years ago
Because it's a plastic cup 'ible. :-) Yes the plastic cups get reused and then recycled. Not everyone has insulated mugs especially at a picnic and this does the trick well and inexpensively. It's just another way to use something that's at hand.

I hope you're reusing those plastic cups as often as possible. But why would everyone not have their own insulated mug?