Glass Insulator

Introduction: Glass Insulator

On those hot summer days it's nice to enjoy a cold refreshing drink, but being summer your cold refreshing drink will become hot and undrinkable in no time at all.

Making a simple insulator for you glass will keep it cool from the sun and your warm hands.

Step 1: The Starting Line.

To make the insulator, I only needed
 -Flexible Insulating foam (Was sold at my hardware store in different sizes but I brought a piece measuring 300x1800mm) 
- Duct tape
- Sellotape
- Single A4 paper

and some basic tools
- Scissors
- Ruler
- Pen
- A glass on with insulator will fit.

Step 2: Measure Twice, Cut Once

The first thing I did was to measures the circumference of the glass by wrapping the paper around it and marking it where the edge met.

Doing this gave me a easier way to measure circumference and a guide on how long to cut the foam and the duct tape.

Step 3: That's a Wrap

Once I had the circumference, I took my duct tape a and cut myself  2 pieces measuring the circumference plus 50mm.

I then took a piece of clear sellotape and stuck a small square on the tip of the tape and stuck it about 20mm from the top. The tape will hold the duct tape while I wrap it sticky side out around the glass. Not to tight so that the insulator can be remove to wash the glass and also not to lose to avoid letting the glass slip out at the bottom.

I continued to wrap the glass in duct tape sticky side out overlapping till the bottom of the glass.

Step 4: Insulation Saves Energy

Now it is time to add the insulation layer to the duct tape. To do this I took my ruler and measured the height of the tape on the glass and subtract about 15mm from that so that the duct tape could be folded around the edge.

Secondly you will need the measurements on your A4 with the circumference of the glass to where you must add 20mm

Once you got you measurements  mark and cut the foam to size to fit around the glass.

If the insulation is cut nice and square it can be stuck to the duct tape leaving the edge of the duct tape exposed at the top of about 10mm.

If not wrap to tightly the sleeve of duct tape and foam should easy be removed by twisting the small piece to sellotape loose.

Once loose the edge of the duct tape can be cut with little tabs that has to be folded flat.

Step 5: The Outer Layer

The final step is to coat the outside of the insulator with duct tape.

Once the edge is folded over reinsert the glass in to the insulator and measure the new circumference, you will find the the circumference has increased due to the extra thickness of the foam.

Now take the new circumference and add a extra 50mm for the overlap and cut your duct tape to the new mark.

Starting at the top stick the duct tape with a 20 to 25mm overlap on the to top. Continue to cover the rest of the foam and when done remove the glass once more.

Cut and fold down the overlapping tape like you did in the previous step but only this time cut the tabs so that the cuts from the previous tabs are hidden under a tab. 

Step 6: Done and Tested

When done I tested my insulator to a uninsulated glass by filling both glasses with ice and water. I left both glasses to stand and let the ice melt but the uninsulated glasses was the first glass where the ice was complete melted. Meaning victory for my insulator and I would guess a bigger victory if held by hot hands around the pool.

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    3 Discussions


    9 years ago on Introduction

    The inner tube might work for the outer layer but I think it might be a bit to grippie on the inside. The mouse pad is a great idea the foam used is about the same but only less dense.


    9 years ago on Introduction

    Great idea! I think I would use my old foam mouse pad so as to make it.