I have made many purse inserts as gifts, I use rectangular place mats as they are already stiff. Just fold the place mat in half on the longest side then fold up each side again to the fold, you can custum make the slots for lipstck, cell phone, pens, tissues, house keys etc. Fold in half again to fit you purse then when you change your bag just lift out and you have all the necessities of life especially lipstick.