water cup with straw 40 oz

Most 40 oz straw tumblers use stainless steel (commonly 18/8 or recycled 18/8) for the cup body, with plastic used for lids, seals, and other small parts.

Common anti-spill features include leakproof lid designs, locking or dedicated locks on the lid, and fully covered or sealed drink openings that minimize splashes and accidental spills.

Most 40 oz tumblers use double-wall vacuum insulation. Some listings also note dual-wall or triple-layer constructions as alternative insulation approaches.

Typical heights range roughly from about 11.4 to 12.5 inches, while widths commonly fall between about 3.0 and 6.3 inches, depending on the shape and lid.

Many 40 oz tumblers have tapered, cup-holder–friendly bases to fit most car cup holders, and often include handles (side or bucket) to make carrying easier.