Lay down a piece of felt. Add two lines of hot glue, dividing the piece into thirds. Then, place another piece of felt on top of that one, and add three lines of hot glue to it, dividing it into fourths. Repeat this process with six more pieces of felt (alternating two lines, three lines, two lines, three lines, two lines, three lines). Cut the entire stack in half, horizontally. Glue those two halves together, and boom! You'll be able to stretch it out to reveal lil' pockets that can hold individual pairs of underwear. Watch this hack come to life.