GreenPaxx Universal cup lid fits many glasses and cups 2 Pack Blue Spill proof and reusable universal cup lids. Originally designed to work with regular pint glasses, minimizing exposure to hormone disrupting chemicals in plastic cups Durable, FDA approved food grade silicone with three rings that stretch/grip the rim of almost any glass FROM APPX 2.75" to 3.75" RIM DIAMETER. Instructions included MINIMIZE SPILLS: Car cup holder, Computer station, Bedside, Mealtime with kids. Perfect for home made smoothies, shakes, juices and soda. Can also be used with hot drinks, fits most standard coffee mugs. Fun and unexpected gift for Juicer or Blender users For adults and kids. Transition from sippy cups. Unique gift for anyone into health and fitness, seniors, teenagers, smoothie drinkers. CLICK the video icon to see how they work GreenPaxx products are third party certified using strict European standards, to be free of lead, phthalates, BPA and PVC. While this costs us more, we feel it's worth it. CAPS & STRAWS SOLD SEPARATELY