"Ohhhhhhh so THIS is where my vintage Body Glove bathing suit went!!!!" Kris wrote beside the photo. "@kyliejenner you are grounded! Wait, I can't do that anymore you're 18....#whoworeitbetter #80's #whoknewyouwouldlikemyoldstuff #recycle #love #mexico #acapulco1989."

Hey, think of it this way, Kris: she's making use of her resources by recycling old fashion!

Make sure to tune into an all new Keeping Up With the Kardashians on Sunday at 9 p.m., only on E!