Kuuk Magnetic Shatterproof Outdoor Wine Glass (1 Pack) Made from shatterproof polycarbonate rather than glass, so you can drink outdoors stress-free Features quick and easy one-touch assembly. Simply hold the glass cup to the stem, and the patented magnetic mechanism does the rest The glass fits upside down neatly on the stem for efficient storage. Both parts are held in place magnetically so they remain clean and unbroken Perfect for outdoor activities and events such as camping, hiking, BBQs and music festivals BPA-free, dishwasher safe, and washes easily by hand