Free samples are available. There are two sizes for choosing, 30oz and 40oz, below price is based on 30oz. Stay cool and colorful with these tall drinking tumblers. This tumbler is made of double-wall insulated stainless steel that will maintain the temperature of 39 ounces of your favorite hot or cold beverages for hours. The food grade clear plastic lid has a sip opening for maximum portability. Fits in most car cupholders. Available in a wide range of cool colors.