4 Travel Tumblers That Actually Fit a Car Cup Holder

This is the 30-ounce tumbler for someone who wants to fill up once and drink all morning. The lid rotates through three positions, a straw opening, a wide sip opening and closed, so it covers water at your desk and a coffee on the drive. There is a handle, the body is 90 percent recycled stainless steel with double-wall vacuum insulation, and the listing says the tapered base is cup-holder compatible. The cup and lid both go in the dishwasher. The trade-offs: 30 ounces of liquid plus steel is heavy, the closed position is not described as leak-proof, so it should ride upright rather than in a bag, and the handle adds width on a crowded desk.

This is the 20-ounce for hot coffee in the car, and it is the one tumbler here that publishes its numbers: 6 7/8 inches tall with a 3 1/2 inch lip, sized for a standard cup holder. The magnetic slider lid opens and closes with a thumb, the double-wall vacuum keeps coffee hot and the outside dry, and the colored versions have a coating that resists chipping. Cup and lid are dishwasher safe. The trade-off is the important one: the listing says plainly that the slider lid is not leak-proof and will not stop spills if the tumbler tips. It is a cup-holder tumbler, not a bag tumbler, and the price reflects the build, not a seal.

This is the 40-ounce for someone who is trying to drink more water and wants one fill to last most of the day. The listing says it fits most cup holders, the press-in lid has a flexible straw that is soft on teeth, and the handle makes 40 ounces carryable. Pro-grade stainless steel means yesterday's iced tea doesn't flavor today's water, and the whole thing is dishwasher safe once you pull the straw lid apart. The trade-offs: the lid is described as leak-resistant, not leak-proof, so it handles a jostle but not a sideways ride in a bag, and a full 40-ounce steel tumbler lives on a desk or in a cup holder, not in your hand.

This is the 12-ounce for a coffee that goes in a bag. The slide-top spout is listed as completely leak-proof, the lid slides shut with one motion, and double-wall insulation keeps coffee hot for up to six hours and iced drinks cold for up to twenty-four. It is BPA- and phthalate-free and covered by a limited lifetime warranty. The trade-offs: 12 ounces is a single cafe cup, so it suits an espresso drinker more than someone who nurses a large all morning, and the cup body is hand-wash only even though the lid is dishwasher safe. The listing doesn't publish a base diameter; a 12-ounce cup is narrow by nature, but check before you count on your car's holder.