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.

5 out of 5 stars for these coffee mugs! They keep your coffee hot for a long time and keep your cold drinks cold for a while, excellent performance in my opinion! Hold 20 ounces of hot or cold beverages, and are perfect size and weight for a good quality coffee mug. The sliding top is really nice and you can take it apart to clean, then assemble it back together no problem at all! Great product, amd it has a non slip rubber bottom!!

Members Mark 20 ounce coffee tumblers are great for more than just coffee. I like to take water with me everywhere, while my husband prefers hot tea. We used these tumblers all day on the weekend, and his tea stayed nice and warm. The lids are nice and tight. No leaks or spills. The sliding tab on top is easy to operate. The best part is that they hold plenty of liquid but still fit in standard vehicle cupholders. The tumblers stayed dry on the outside and are top rack machine washable.

I absolutely love the earthy colors of these tumblers, and they are in a set of 2. I prefer to use one for my ice water and one for my hot coffee. The ice water remains chilled and with ice for 24 hours at a time, unless I drink it sooner. My coffee remains hot and enjoyable for several hours. It is easily washed on the top rack of my dishwasher. So I can use them daily. They are easy to clean and put back together. The size is perfect to fit in my hand and not be bulky like a lot of other tumblers. My Tumbler set is my go to for every day drinks now.

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.

This sleek, two-pack Member's Mark insulated mug set features an attractive, inverted purple and pink color scheme. Highlights include secure, screw style leak-proof lids and non-slip rubber bases that prevent sliding and protect surfaces. The mugs are lightweight even when filled. While the intricate lid mechanics require careful cleaning, the stylish, ergonomic design and durability is perfect for daily commutes. Instructions are included related to care and cleaning.

This 2 pack of coffee tumblers are a great addition to any household. I love that the lids are interchangeable to give an offset look or make them match completely. They are completely dishwasher safe which makes cleaning easy. The slider and silicon rings on the lid are removable so you can really deep clean and not have to worry about mold. Fits in most any cupholder. Absolutely love these!

These 20 oz coffee tumblers are perfect! The set I have has one blue and one green and they have lids with slide tops. They are top rack dishwasher safe, which is a huge plus for me because it seems like all of my coffee tumblers are hand wash only. They are light enough to be able to pick up easily but also have a decent weight to them. They're easy to hold and have not leaked when I use them. They keep my coffee hot for quite a while as well. I would definitely recommend these!

These coffee tumblers are now must for every morning. We separated according to beautiful colors between me and my other half. We take around 500mL every morning and lasts whole day without any spills. The rubber gasket is ultra high strength and packing is great. Maintaining it is quite simple and due to highly smooth interior nothing clings or sticks. The magnetic lock mechanism provides safety against accidental spills.

I am very surprised at the quality of these coffee tumblers. There are much better than I expected. A great value for the money. They are a nice weight and they feel good in your hand they work very well. I'm very happy with these and would recommend them to anyone.