The 470mlGuzzle Buddy 2GO Unbreakable Wine Bottle Glass is made from Tritan copolyester plastic and uses a 100% silicone sleeve that screws gently into most bottles to provide a perfect seal.PBA Free, odour free, and won't crack or yellow over time like acrylic.Pouring wine is such a chore! Simply screw the glass into your favourite bottle.Aerate, pour and drink in one easy step.It makes drinking from the bottle CLASSY.or just plain FUN! Because who wants those "Looks of Judgement".The Guzzle Buddy 2GO Unbreakable Wine Bottle Glass is a HILARIOUS GIFT for wine lovers or anyone who wants to be the "hit" of the party! It's the perfect drinkware for bars, beaches, or just hangin' by the pool! It's FREEZER SAFE, so now you can enjoy an icy cold, frosty glass! Hint: Did you know this glass fits in beer, soda and cider bottles too.CLEANING IS EASY! Just put it in the dishwasher top rack overnight, and it's sparkling clean the next morning.Add some class to drinking straight from the bottle! How it Works Grab your Guzzle Buddy 2 GO and follow these three easy steps: 1.Open your favourite bottle.2.Insert the Guzzle Buddy by screwing it directly into the top of your bottle.3.Tilt the bottle and enjoy drinking straight from your new "bottle" glass.