-foam to construct the straw out of
-glue to glue the pieces of foam together
-a drywall keyhole saw to cut the foam
-paint to paint the straw after it was cut
-measuring tape to measure the length and width of the straw
We had some difficulty with this saw, you might find it easier to use a laser cutter.
You have to spray multiple layers of plastidip on the foam in order for it to stick but be careful because too much can eat up the foam.