Introduction: The Flatpack Thermos

The Flatpack Thermos is easy in his use. When he's empty you can untie the buttens and make him flat. This way, The Flatpack Thermos doesn't take too much space in your closet, handbag etc.

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Step 1: Materials

What do you need:






work knife

needle and thread



plastic folder

elastic string



sewing machine

Step 2: The Inside Forms

Cut out the five shapes out of the plastic folder.

Make in the trapezium a hole.

The measures are indicated on the picture.

Step 3: The Pattern

Lay the five forms on a paper, in the right position. Make sure there is a little place (5 mm) between each part, so the fold is possible. Follow the forms with a marker and cut it out, now you have your pattern.

Lay the pattern on the fabric you want on the outside of your thermos. Make sure you write it on the most beautiful side of the fabric. Cut it out with a large (50 mm) border encircling.

Step 4: The Loops

Make three loops (the size is dependent on the size of the buttons) with the elastic string.

Stitch the loops on the fabric on the right position on the trapezium. Make sure the loopt are laying in the inside of the shape. Because; when you will turn the fabric, they need to be on the outside.

Step 5: Stitch the Two Sides

We need to have the form of the pattern on the other side of the fabric. The most preciously way to do this, is with pins. Pin on each corner of the form a pin. This way you can connect all the corners on the backside with a pencil, and you'll have the form of the pattern on the right side.

Lay the fabric on the second fabric you've chose. Pin the two on each other, so they won't move while stitching. Make sure the loops are between the two fabrics. Stitch with the sewing machine the two fabrics on each other. Follow the lines on the fabric you've just indicate. Let a little border (5 mm) so there's a little clearance for the plastic shapes later. Let one side open, so you can bring in the shapes. When the stitching is done, you can cut off the borders. Don't cut the borders on the still open side! Now you can turn the whole fabric through the open side.

Step 6: The Shapes in the Thermos

When the fabric is turned, you can put the plastic shapes one by one in the thermos. After each one, you'll need to stitch next to the shape. This 'll make sure the shapes don't move over each other. After the last shape, you turn the fabric to the inside, pin it. Then you stitch the thermos completely closed.

Step 7: The Buttons

Stitch three buttons on the fitting position for the loops. Make sure they're not too loose.

Step 8: The Hole

Make with a knife a cross in the fabric where the hole in the plastic is. Then you fold the four patches on each side to the inside. With a needle and thread you can close and complete the hole.

Step 9: Close the Thermos

As final step you close the thermos. Stitch with a needle and thread the two sides on each other. Use the stitch shown in the picture.

Step 10: Finish

Step 11: The Aluminium Bag

The aluminium bag works with a screw cap. I couldn't find or make a fitting cap. You can see how the aluminium bag works in the pictures.

To illustrate the working of the thermos, i've made an example, but this is not the right design!

Step 12: Thermos in Use