DIY Bathroom Storage PVC curling iron holsters Use hook-and-loop tape to attach 5-in. lengths of 2-in.- diameter PVC pipe to the vanity door to hold the curling irons. Do the same thing with 3-in. pieces of 1-1/2-in.-diameter pipe to hold the cords. Just measure your curling irons to see how long your “holsters” need to be. Let your curling irons cool before you stow them away.