Blue tumblers in these listings are made from several common materials, including glass, various plastics, and stainless steel (notably 18/8 stainless steel).
The listings show a range of capacities, including 10 oz, 12 fl oz, 14 oz, 15 oz, 20 oz and 40 oz.
Many blue tumblers use straw-style lids (some with included or reusable straws). Lid materials noted include silicone, plastic and copolyester, and lid styles include straw lids, flip-top closures and twist-off tops.
Several tumblers use double-, dual- or triple-wall vacuum insulation. Reported cold-holding statements from listings include: "keeps drinks cold for 11 hours and iced for 2 days", "keeps drinks cold for up to 18 hours", "keeps drinks cold for 8+ hours", and "hold ice up to 48 hours." Insulation performance varies by model.
Listings commonly describe leakproof or spill-resistant lids and valve- or straw-based systems. Common closure types include click-lock or flip-top lids, screw-on tops, and splash- or no-drip straw designs.
Several listings mention recycled content or post-consumer recycled material. Some specify high recycled stainless-steel content—for example, 90% recycled 18/8 stainless steel—and a few note the products are recyclable.
