This uniquely styled 20 oz tumbler maintains the temperature of your hot and cold drinks while offering a solid and quality construction.This bottle is made above industy standards with the following features: 1.stainless steel construction 2.vacuum insulation 3.Seamless structure on side and bottom of inner wall 4. Lower your carbon footprint with econ friendly bamboo material 5. Powder coated finish Bamboo Items for more nature: Thanks to its hardy nature, bamboo can grow in all kinds of climates and doesn't need harmful pesticides or herbicides to grow well. Requires no irrigation Rarely needs replanting Grows rapidly - harvested in 3-5 years Produces 35% more oxygen than trees Sequesters carbon dioxide and is carbon-neutral Critical element in balancing oxygen and carbon dioxi