Here are the directions, and but you can click here for pictures to go along with them.
Quote:
To use it you place your sandwich in the center and fold in the sides.
And then fold up the bottom.
And then fold down the top and secure with a velcro tab.
Then when it’s open it doubles as a placemat.
It is shaped like an octagon so to make it I first made a paper template for a pattern.
Then cut out the hexagon from a vinyl coated fabric (I got mine from Reprodepot) and then out of a cotton fabric for the exterior. For the velcro closure, sew on the bottom middle portion the hook side of the velcro and then slip in the loop side of the velcro into the top middle. You should put about 2 inches inside the layers so the flat side is against the outside cotton fabric. This ensures it will flip correctly when you turn it rightside out. (First, I sewed a decorative twill tape to the top of my velcro but that’s not necessary.)
Then, with front sides together and sew around the edge. If you use a vinyl coated fabric, a walking foot is super helpful to prevent the vinyl from moving on you. If you don’t have one, here are more suggestions for sewing vinyl by machine.
Just be sure to leave an opening so you turn it rightside out afterwards. Finally, run a topstitch around the edge which will sew up the opening you left and you’re done!
And then fold up the bottom.
And then fold down the top and secure with a velcro tab.
Then when it’s open it doubles as a placemat.
It is shaped like an octagon so to make it I first made a paper template for a pattern.
Then cut out the hexagon from a vinyl coated fabric (I got mine from Reprodepot) and then out of a cotton fabric for the exterior. For the velcro closure, sew on the bottom middle portion the hook side of the velcro and then slip in the loop side of the velcro into the top middle. You should put about 2 inches inside the layers so the flat side is against the outside cotton fabric. This ensures it will flip correctly when you turn it rightside out. (First, I sewed a decorative twill tape to the top of my velcro but that’s not necessary.)
Then, with front sides together and sew around the edge. If you use a vinyl coated fabric, a walking foot is super helpful to prevent the vinyl from moving on you. If you don’t have one, here are more suggestions for sewing vinyl by machine.
Just be sure to leave an opening so you turn it rightside out afterwards. Finally, run a topstitch around the edge which will sew up the opening you left and you’re done!
I think when I get around to making one, I'll use some kind of insulation in between the layers; maybe foil or the insulation from an old lunchbox 3nodding
