Universal silicone. Spill-proof lid. Dishwasher & microwave safe. Easy to use & clean. Bonus silicone straw. 100% silicone. 100% safe. Make the switch. Your cup is covered - with the Siliskin Top. 100% food grade silicone. www.gosilic.com. Visit www.gosilic.com. Questions? Please contact admin(at)gosili.com. BPA free. Please recycle packaging. Designed in the USA. Made in China.