DUBUXW Insulated Coffee Tumblers with Flip Lid 12oz / 17oz, Stainless Steel Coffee Mug Leak Proof, Vacuum Insulated Coffee Mug Reusable Cup, Keeps Cold and Hot for Coffee Tea

This is a great tumbler for hot coffee! The dark blue color looks fantastic. Just be aware that while it's advertised as 17oz, that's filled to the absolute brim. The usable capacity is about 15–16oz. The lid fits perfectly. I love that I can put my creamer and sugar in, seal it, and shake it to mix without needing a spoon—it handles the heat pressure and shaking without leaking a single drop. The spout design is also excellent, shaped like a standard coffee lid, so you won't accidentally spill on yourself as with other curved-spout designs. I've tried a few of these from different sellers, and this one is a winner.

This size works great for my Keurig Mini coffee maker. So difficult to find any smaller sizes in stores. The larger thermoses and insulated drink ware are so cumbersome to carry around on my jobs. I like to make a 10oz cup of coffee before I dash out the door for work. The hole size for drinking is a plus for me. The smaller hole size helps reduce the spillage on my clothes when I'm trying to drive and drink at same time :) (blame those chuckholes). Keeps my coffee warm just fine. So far, no leaks, as long as the lid is properly twisted on :) Fits my vehicle cup holder good. The bottom no-slip and comfort grip is great. Quality stainless steel is easy to clean with wide opening. Great value and plan on purchasing a second one in a different color for just my water. The overall size is great to fit inside my work bag. Love it!

Bought one of these a while ago that I loved but lost it. Replaced it with a cup that has a slider top that I loved for the first few weeks until the slider broke. Replaced that with two more of these. They don't leak, they keep everything hot or cold for hours and the lid flips and seals tight.

Perfect size and keeps drinks hot for hours I originally received this tumbler in lavender as a Christmas gift, and I was so impressed that I have since purchased four more. I had been looking for a coffee tumbler smaller than 20 oz—specifically something in the 12 to 15 oz range—that was comfortable to hold, and this fits perfectly. The design is lightweight and has a great feel in the hand. The flip lid locks securely, and the colors are very vibrant. It keeps hot beverages hot for a long time, especially with the lid closed, and keeps cold drinks cold for several hours. I really like the quality and intend to buy even more colors.

Good quality cup, fits in car cupholder, nice grip and keeps coffee hot for hours!

I bought this mug in February 2025 and have used it almost daily. This mug still doesn't leak. I toss it into my work bag in the morning and I don't have to be concerned with it leaking on my work gear. It isn't the best at keep drinks piping hot for a long time but I prefer my drinks warm anyway. I dropped this hard on its lid recently and while some pieces chipped off the edges of the lid due to the height of the fall, it still doesn't leak and didn't burst open. The paint is chipping a little around the edges but I tend to soak it a lot and have accidentally soaked it in bleach water too. I try to limit my caffeine and 12oz of coffee has become just enough for me. I love this cup and will buy one again if this one ever fails.

Keeps the coffee hot for a long time. The lid seals very good and seems to be well made.

I like this coffee tumbler, but I don’t love it. It’s very sturdy, solid, and made well. I bought it in the dark teal and it’s very pretty. I use a somewhat narrow straw because I have sensitive teeth. After 2 1/2 to 3 hours, my coffee is warm. It for sure doesn’t stay hot. Just warm. I was originally thinking I’d buy one in another color also but that was only if it kept my coffee hot, which it doesn’t. If it wasn’t for the fact that it doesn’t keep my coffee hot I would buy another one.