Add a bright detail to any Rambler(R) Tumbler or Mug with one easy switch. These pop-on, pop-off magnets pair perfectly with our dishwasher-safe MagSlider(TM) Lid so you can mix and match your colored magnet with your favorite Rambler(R) Drinkware by the hour, or by the day. Not to mention, it's a pretty handy trick if you're aim in' to prevent drink mix-ups.