This double-insulated Swimming Honu tumbler is made from BPA-free acrylic that will help keep beverages cold and comes with a twist on the lid as well as durable straw with stopper to keep the straw in place. For use with cold beverages, dishwasher safe on the top rack. Not recommended for children 3 and under. Not for use in microwave. Tumbler measures approximately 4” Diameter X 6 ¼” Height.