Stunning is the right word for this stainless steel tumbler! It is made of a stainless steel outer layer and a plastic inner layer. This double wall insulation ensures that hot or cold liquids are kept in optimum condition. This cup also has that sleek luxurious gradient design with an ash upper layer and different colors in different cups. To complete the intriguing look of this piece, its lid is a screw on, spill-resistant with the same color as the body of the tumbler's lower gradient.Extending from the cup is a 9" straw with matching colors as the cover. .This item is BPA free and is FDA approved for use. CLEANING INSTRUCTION: This cup should be hand washed as it does not support dishwasher usage.