Designed to enjoy the craft and sensory drinking pleasure of coffee on the go. KeepCup Brew Cork uses tempered soda-lime glass. It is durable, shock-resistant, dishwasher safe, and can withstand high temperatures. The KeepCup Brew Cork's splashproof, press-fit lid allows room for your nose, while the mouthpiece ensures optimal liquid flow and aroma release. Lovely to drink from with the lid on or off, it's lightweight, easy to carry and fits comfortably in your hand and cup holders. The plug closure keeps the mouthpiece covered when not in use, and is easily assembled to make cleaning and care easy. All KeepCup Brews are independently lab tested to ensure they're free from BPA, BPS, phthalates including DEHP, lead, and cadmium. Key Features of the KeepCup Brew Cork (6oz) Extra Small Hard lid for ease of use and drinking pleasure Splash-proof lid Replicates internal volumes of disposable cups Materials and Parts Durable fully tempered soda-lime glass Natural cork band Non-toxic.