DUBUXW Insulated Coffee Tumbler with Flip Lid (12oz)

Yes — 9 reviewers specifically confirmed it fits standard car cup holders. The 12oz size in particular is compact enough to slide in without issues. One reviewer did mention the base can be wider than some cup holders, so if your car has unusually narrow holders, it's worth measuring first. But for the vast majority of vehicles, it fits without any trouble.

Yes, that's one of its design strengths. The flip-top lid allows one-handed operation — you can pop it open, take a sip, and close it without looking. The flip-top also has a lock mechanism to prevent accidental opening. Reviewers even noted that the small drinking hole reduces spillage when driving over potholes or bumps, which is a practical detail you don't always see mentioned. Combined with the silicone grip band for secure handling, it's well-suited for car use.

Yes — 11 reviewers called out the wide-mouth opening as making cleaning simple. You can easily get a sponge or bottle brush inside, and the removable silicone seal on the lid means you can take it apart for thorough washing. This matters more than people realize, especially for tea — residual tannins build up and affect flavor if you can't clean properly. The wide mouth on this one makes that a non-issue.

Reviewers confirm it works well for both hot and cold beverages, including iced tea. The double-walled vacuum insulation keeps cold drinks chilled, and importantly, it prevents condensation from forming on the outside — so no water rings on your desk or slippery grip. The small drinking hole in the flip-top also helps reduce spillage when you're moving around, which is a nice touch for iced beverages that tend to slosh more than hot ones.

The DUBUXW is a travel tumbler rather than a tea infuser — it doesn't come with a built-in strainer or infuser basket. If you brew loose-leaf tea, you'd need to steep your tea separately and pour it in, or add a portable infuser basket that fits the wide-mouth opening. That said, it works well for pre-brewed tea (both hot and iced), and reviewers confirm it handles both coffee and tea applications nicely. If you specifically need loose-leaf brewing on the go, look for a tumbler with an integrated infuser.

A 12 oz cup is roughly the size of a standard "tall" at most coffee shops — enough for a solid single serving without being bulky. The DUBUXW 12oz is specifically praised by reviewers for being the right size for portion control and fitting directly under Keurig Mini and other single-cup brewers. It's compact enough to fit in car cup holders and bags without taking up much space. Worth noting: if you're considering the 17oz version instead, some reviewers found the actual usable capacity was less than advertised.

It's ideal for daily commuters who want a reliable, affordable tumbler for their morning coffee or tea. It's also great for anyone using a single-serve brewer like a Keurig, since it fits right under the spout. The simple screw-on lid and one-handed flip-top operation make it beginner-friendly — you don't need to figure out any complicated mechanisms. It's not the best choice if you need all-day heat retention or want premium-brand build quality, but for the price point, it delivers solid everyday performance.

There are a few things to be aware of. Some reviewers noted that the exterior finish can look more plastic-like than the photos suggest, and one mentioned the color coating bubbling over time. The silicone grip band, while comfortable, can shift or lose grip with extended use. And a small number of buyers received units with lid seal defects. These seem to be quality control inconsistencies rather than universal problems — most reviewers are happy with theirs — but it's worth inspecting the lid seal when yours arrives.

While the DUBUXW isn't a travel tea set itself, its wide-mouth opening makes it compatible with many portable tea infuser baskets you can buy separately. You could steep loose-leaf tea directly in the tumbler using a drop-in infuser, then remove it when your tea is ready. The 12oz size is actually ideal for single-serving tea preparation, and the insulation will keep your brew at drinking temperature for a few hours afterward.

The key things to look for are leak-proof sealing, insulation quality, and ease of cleaning. The DUBUXW checks those boxes with its screw-on lid and flip-top seal (18 reviewers specifically praised the leak-proof design), double-walled vacuum insulation, and a wide mouth that makes cleaning straightforward. Also consider whether you need all-day heat retention — this tumbler reliably holds heat for 3-4 hours, which is great for commutes but not for sipping throughout a full workday.

It depends on what you prioritize. The DUBUXW tumbler is a strong budget-friendly option if you need a leak-proof, portable mug for commutes and short trips — reviewers confirm it keeps drinks hot for 3-4 hours and fits standard car cup holders. For all-day heat retention (6+ hours), you'd want to look at premium brands like Contigo or Zojirushi. But if your main use is a morning commute or keeping tea warm through a meeting, the DUBUXW handles that well at a fraction of the price.

Double-walled vacuum insulation is the gold standard for travel mugs, and the DUBUXW uses this construction in stainless steel. Reviewers confirm it prevents condensation on the outside (no sweaty rings on your desk) and maintains temperature in both directions — keeping hot drinks warm for 3-4 hours and cold drinks chilled. It's a solid entry point into double-walled tumblers, though if you need longer heat retention, you may want to step up to a higher-end option.

The DUBUXW tumbler uses a stainless steel interior liner, which is generally considered one of the safest materials for hot beverages — it won't leach chemicals the way some plastics can. One reviewer did mention a slight plastic taste initially, likely from the lid components, but this typically fades after a few washes. For the health-conscious, stainless steel interiors are preferable to plastic-lined tumblers, especially for hot drinks where heat can accelerate leaching.