Common capacities range from about 20–21 ounces up to 30–40 ounces; typical options listed include 20 fl oz, 21 oz, 30 oz, and 40 oz.
Many tumblers use double-wall or vacuum insulation for extended temperature retention. Example listings claim cold retention spanning roughly 9 hours up to as much as 40 hours.
Common lid styles include flip-top and drink-thru designs; some lids are multi-mode (e.g., sip-or-swig or multi-position) and many listings include or accommodate a reusable straw.
Several listings explicitly state ‘Includes: Straw’ or describe a reusable straw; other lids are designed with a straw opening or are sold with a plastic straw.
Many tumblers include ergonomic or comfort-grip handles or side grips and are described as fitting most cupholders for easier on-the-go use.
Most listings emphasize use with cold beverages; only a few explicitly state they’re suitable for both hot and cold drinks. Check each product’s description for specific temperature claims.
