Can Cooler Mod




Christmas gift from the love of my life to her favortie geek.
USB Beverage Chiller
The CoolIT USB Beverage Chiller is the only way to keep your drink cold while you're at your computer and it looks cool on any desktop!
Works great but I needed to mod it a little to bring it up to my specs. Bottom stayed cool but top of can warms up and we cant have that! :-)

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: First a Mockup

I grabbed a old Nasa can cozy and cut about 1/3 off the bottom leaving two ears that I could wrap under the cooler to keep it up right and in position. A little duct tape never hurts any project :-)

After testing with a infrared hand temp scanner the top of the can was now within 3 degrees of the bottom. Not bad

Step 2: Crack It Open!

Now to see what makes this baby tick! Coolitssytems gets high marks from me. They used screws! Easy to crack the case. Yea!

Step 3: Piezoelectric Spot Cooler

One small fan, one big aluminum heat sink and a piezoelectric heat transfer plate and thats all. Nice and simple!


OK mock up works, but Duct tape on the desk is a little tacky, Now it time to jump into Inventor and start a 3D model


Modeled the can cooler and added some insulation.


I decided to add a plastic sleeve around the insulation to give it some more rigidity.


Using the data from my Inventor model I made a rapid prototype sleeve using a Genisys xs 3D printer. I made the ouside walls .125 thick with a honey comb pattern to trap air as a additional insulator.

Step 8: All Done

I created the sleeve to slip down on both sides of the cooler with two little ears. I used some double faced tape on to keep the whole thing in place centered on the cooling plate.

I slipped the cozy inside of the sleeve with a little spray stick on the inside walls.
Note I added a lip to the sleeve to keep the cozy from sliding out when the can or bottle is pulled out

Now I can have a cold can when ever I want and never have to come back to a warm soda!!

Isnt technology great!!



    • Indoor Lighting Contest

      Indoor Lighting Contest
    • Make It Fly Challenge

      Make It Fly Challenge
    • Growing Beyond Earth Maker Contest

      Growing Beyond Earth Maker Contest

    13 Discussions


    8 years ago on Introduction

    I like this setup but I think it could be better if aluminum was used. Maybe more fans as well. I'm looking to maybe purchase one to tinker with.


    8 years ago on Introduction

    I that could be done but it maybe a lil' more involved than this project. You could use a micro controller and temp sensor to help regulate the temp.

    You'd think, but i've installed a peltier in a fanless setup, and i've never had any problem with condensation. Granted i coated the damn thing in heat sink compound, but your processor will keep the poor thing above dew point.


    I too have one of these, so far the only mod I've done is I added a switch to the side so I didn't have to keep unplugging it/plugging it back in. I'll probably give this a try as well. Have you tried foil on the inside of your sleeve? I'd imagine that the colder temperature would probably transfer to the top more quickly with a good amount of conductive material to bring it upward.

    1 reply
    Rob K

    10 years ago on Introduction

    I have one of these coolers. They do work surprising well but only on a already cold can to keep it cold. For a room temp can it can take several hours to become cold.


    10 years ago on Introduction

    Very nice! I especially like the rendered drawings along with the as-built photos. Why did you keep all your pic's attached to the introduction, though? Just because you uploaded them all at once? It make the display (and the PDF) a bit crowded and redundant.

    3 replies

    Reply 10 years ago on Introduction

    Killerjackalope is right, below. It's not a "piezoelectric" crystal. It's called a Seebeck crystal -- it can convert thermal energy into a voltage, and vice versa. Also Peltier (the two discovered the effect independently). And I wouldn't call it a "rookie mistake". It's a lot more convenient to upload everything in one show, and have the same tags applied throughout.

    Not really - uploading them all together isn't bad, plus if they tell the story well then it's sometimes nice to view the 'ible like a slidehow, whether you do it is personal preference. I'm reasonably, only reasonably sure that the cooler's thermoelectric and that piezo electric referred to the likes of certain crystals being used to convert electricity in to movement or vice versa - If I wrong ignore. Good job on the project, it looks really professional at the end, I prefer the finished product in a lot of ways to the original, added bonus of it being nigh on impossible to spill by knock the can off the top...