The original unbreakable non-skid wine glass that was first introduced in 1987. It holds 12-ounces of wine and will stay in place even at a 20 degree angle. Low center of gravity means thye're hard to tip over. They're made of Tritan and come with a limited lifetime warranty. We've sold over 660,000 of this product over the years and people rave about how long they've had them on their boat. Set of 4. 5" tall, Base is 3 3/8" Hand washing recommended.