How does the 30 oz size compare with a 40 oz tumbler?

It holds about a quarter less and is lighter, with no handle. It fits cup holders more easily than most 40 oz handled tumblers.

Will it keep drinks cold all day?

Double-wall insulated tumblers of this size typically keep iced drinks cold for many hours and hot drinks warm for several. Ice may melt overnight.

The 30 oz body is narrower than 40 oz handled tumblers, so it fits most standard car cup holders. Very small or shallow holders may still be tight.

Many insulated tumblers are hand-wash only to protect the vacuum seal and the printed design. Check the care instructions that come with the cup.

Usually the tumbler and a lid; some listings add a straw. Confirm the included accessories before ordering.

Yes, if the person likes Kid Rock and uses a large cup daily. It is a practical gift with a fan-specific design.

At eBay, for $18.95, as of our latest check.

$18.95at eBayChecked Nov 11

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