Unlike other slider lids, ours harnesses the power of magnets for smooth opening and closing.Specifications and Features:Magnets also makes for easy cleaning - pop the MagSlider off, rinse, dry, and return it to the LidWhile the magnet on the included MagSlider Lid adds a barrier of protection for keeping drinks contained and preventing heat or cold from escaping, please note - this magnet component is not leakproof and will not prevent spillsThe Lid is crystal clear lid so you can always see if you're in need of a top off