Thermos 16 Ounce Leak-Proof Travel Tumbler TherMax double wall vacuum insulation locks in temperature to preserve flavor and freshness durable 18/8 stainless steel interior and exterior Leak-proof 360 drink lid is easy to use and drinkable from any direction Integrated stainless steel carry loop with carabiner for space saving and instantly accessible attachment to backpacks and other gear Rubberized shock absorbing base with wide stance for stable footing