• Laser engraved • Customizable • Stainless steel cup 500ml • Double-walled • BPA-FREE • Leak-proof lid • Lid with closable drinking opening • Stainless steel straw + cleaning brush • Hot drinks can be enjoyed for up to 6 hours. Cold drinks can be enjoyed for up to 12 hours. • Rustproof • Food-safe/no harmful substances • No metallic taste