Made from 18/8 Medical grade stainless steel. Resultingly the Glock Coffee mug to go doesn’t transfer flavour. There is no metal aftertaste. Furthermore, the lid and cup are BPA free. The press-on lid prevents splashes and keeps drinks warm longer. Along with the double-walled vacuum insulation technology of the travel mug. The Glock Travel mug is reusable thousands of times so it makes much more sense than disposable cups. Cup Holder compatible.