Another popular repurposing? Contour and highlight sticks. Though the idea to reconfigure your favorite contour has been kicking around YouTube for awhile, an army of new Instagram posts tagged with #DIYEOS detail the process in seconds. It takes a little alchemy, yes, but the ingredients tend to be simple: things like liquified lip balm, coconut oil and the pigment from your favorite powder contour or shimmery shadow. Like the Neutrogena soap hack, these ingredients are also melted down, then poured into the spent EOS container to harden. After it solidifies, you have a no-brainer contour or highlight stick with which to carve those threes and C-shapes into the sides of your face. (Just make sure your base isn't pore-clogging.)