Vacuum seal does not leak! These are my goto coffee and water tumblers. I have Parkinson's and it makes me Sir Drops a Lot. I love that the seals stay sealed. Both cups are full of water. One cup upright and the other upside down. No leaks onto the counter.

The members mark coffee tumblers are very nice. I fill it up every morning on my way to work, and when I finish it a couple hours later, it is still nice and warm. I have not had it leak yet, and it didn't spill when I knocked it over. They are very easy to clean. My wife wants to get more colors now because she loves using them too.

I absolutely love these travel cups! The black and white colors were ideal for my preferences. The vacuum seal keeps my drinks hot all day and the screw top makes the cups completely spill proof when the lid is closed. They hold 20oz of liquid and are dishwasher safe. The size is perfect to fit right in my hand and they fit in every cup holder I've tried.

These tumblers do not leak even when turned completely on their side, even when turned completely upside down! The outside of the tumblers do not get hot or warm at all and stay comfortable to hold while the inside stays hot. The lid screws on and has a magnetic sliding tab that closes to keep the area that you drink from closed when not using. This magnetic sliding tab creates a vacuum like seal and really keeps your drink hot, you can hear it when you open the slide letting the air in. The colors are super cute and stand out from others. The shape allows you to grip the tumbler securely. The lid comes apart so you can thoroughly clean it so no hidden or hard to reach mold. To top it off this tumbler keeps my drinks hot all day.

These adorable 20 ounce travel coffee tumblers are good quality. I love that they come in a variety of colors. They are well made, stainless steel, top rack dishwasher safe, and have a max fill line printed inside so you don't over fill your cup. I also like that the closer tab on the top is magnetic and easily comes off, as does the the tab on the inside cover, for a more thorough cleaning. I think they would be perfect for hot or cold coffee.

We picked up this 2 pk of MM 20oz Coffee Tumblers at Sam's Club. The stainless steel construction is sturdy and well made. The double walled design works great. Coffee stays hot and ice lasts for hours. The magnetic slide lid is a very special feature. It opens and closes very smoothly. The base fits in a standard cup holder in your vehicle. The exterior stays dry and cool to the touch, so no worries with holding. Cleanup is easy since the lid screws on and off and the slider pops off for easy cleaning. Solid value and Definitely recommended.

The members mark 2 pack coffee tumblers in tan and brown have quickly become my favorite travel mugs. The colors are attractive, neutral and stylish and I especially like that you can mix & match the lids to the cups. The lid design is my favorite part. It pours the coffee smoothly and doesn't spill a drop when it's fully closed. The material is comfortable to grip and doesn't slip when I pick the tumbler up. My coffee stays hot and my iced tea stays cold! Great product.

I have enjoyed using this product for both hot and cold items. I generally run hot water in it before putting in under my Keurig for coffee it stays hot for hours I have also used it for cold beverages. It keeps ice in it all day

These tumblers are amazing! The lids are fantastic and have a great suction to them so they're pretty leak proof which makes it easy to carry around on the go and to work! Great insulation and keeps my cold brew chill! I don't care for the mismatch colored lids on them but otherwise they're fantastic and a great find! I haven't tested out hot beverages in it yet but I can tell it'd be pretty good at keeping it warm based on how cool it keeps my cold brew.

There are so many drink tumblers and slippers out there. What is different with these 20oz tumblers from Member's Mark? Magnets. What does that do? It changes the structure of the lid, making for less complicated components and as a result, an easier cleaning the tumbler. Oh, and they are dishwasher safe! And there are multiple color combos! The top part slots in a groove on top and the lower part is a minor V-shape and is aligned between two tabbed holes, with the strong magnets keeping them together through the lid, either open or closed. That's it; there's nothing else, no additional holes or plastic on plastic where grime can build up. Slide the top part open and there's a satisfying click as the lower portion opens up in tandem. Same in reverse. The aperture is not overly large, so this isn't a big gulpers best friend, and you cannot use a straw, but this is marketed primarily as a coffee or hot drink tumbler, so less straw, more tilt and sip. The stainless steel lining is a must and keeps hot hot and cold reasonable cold. The padded rubber base is a nice touch. And again, they are dishwasher safe. I recommend these Member's Mark 20oz magnetic coffee tumblers for those who want a set of 20oz sized colorful tumblers for hot or iced drinks that are easy to clean and easy to use.