Drinkware Stacker, Expandable Stackable Kitchen Cabinet and counter Shelf Organizer, Mug Organizer, Cupboard Organizer, kitchen space saver, mugs cups and glasses organizer, 6PK Expandable Stackable Kitchen Cabinet and Counter Shelf Organizer (6pk for set of 12 mugs) Stacker, Organizer and Space Saver for Mugs, Cups and Glasses Kitchen Cabinet and Cupboard Shelf Organizer and Space Saver Safely Stacks Drinkware, without the risk of Chipping or Breaking your Mugs, Cups or Glasses It's an Adjustable Gadget that works on almost all sizes and shapes of drinkware