About this item Enough to use – You will receive 18 cup insulation covers in 6 colors:white,yellow,navy,grey,black,and pinkish,which are enough to meet your daily matching needs. Long term reusable – made of silicone,with good elasticity and heat resistance,washable,reusable,easy to stretch,not easily break or deform,sturdy and thick. Perfect size – upper diameter 7.5cm/2.95in,lower diameter 6.8cm/2.68in,height 6cm/2.36in,suitable for most daily water cups,glass cups,thermoses,mugs,etc. Anti slip design – These silicone sleeves are placed on your glass bottle or water cup to secure it in place,providing excellent anti slip effect,easy grip,and ergonomic fit. Hand protective -2mm thick,provides perfect heat insulation,protecting your hands from hot/cold water damage.With this cup lid,you can easily pack hot or cold drinks.