This is the best I've ever used! The price is incredibly reasonable, and it keeps my drinks chilled for hours, even during the sweltering summers in Oklahoma. After being outside for hours, my drink remains ice cold!

The thermal insulation of these tumblers is exceptional, maintaining the temperature of drinks effectively and being highly resistant to leaks. The lid's slider is secure and never closes on its own. Drinking directly from it can be slightly tricky, but I usually use a straw, so it's not much of an issue.

These mugs are a good size, of high quality, and come in attractive colors. The cover for the drinking area is somewhat stiff to move, but it's not a major inconvenience.

This cup is fantastic. I filled it with coffee at 5 pm and couldn't drink it until around 10 pm because it was still too hot. Now, I add a few ice cubes to cool it down. I also put iced tea in it at 5 pm, and the next morning, ice was still present.

I typically use it for coffee, and it does a remarkable job of keeping it hot. Recently, I put a cold drink with ice in it at 3 pm, and by 6 am the next morning, there was still ice in the tumbler. That's impressive!

My husband and I decided to try these out. We've experimented with numerous cups in the past, but these surpass them all. Does it fit in car cup holders? Absolutely! Is it comfortable to hold? Definitely! Nearly spill-proof? Indeed! (Though no cup is entirely spill-proof, this one comes close). Worth the investment? Certainly! Effective at keeping drinks chilled for extended periods? Without a doubt! I strongly endorse these.

I'm thrilled with the hue! I use it daily, and it's proving to be durable. Cleaning is a breeze, and it keeps my coffee warm for a satisfactory length of time.

These tumblers maintain either warmth or coldness for extended periods, are easy to clean, and fit perfectly in my car's cup holder. This has become my favorite item for any drink, and I don't want to use anything else. Yes, it's a bit pricey, but it's worth it!

The mug is nice, but the drink hole does have a slight leak.

I frequently drink iced water throughout the summer, and usually, the cups sweat, leaving stains on our tables even with coasters. This cup eliminates that issue, and even if left in a hot car during shopping, I return to find my drink still cold. I've gifted it as a small token of appreciation, and it's been well-received by everyone.

I own three and adore them! They keep drinks hot for hours (and likely cold too, but I've only used them for hot drinks).

I'm a big fan of these tumblers. I purchased four in various colors. We use them for coffee and all kinds of drinks, whether we're heading outside or driving. They fit perfectly in a car cup holder and are easy to clean.

The mug is proficient at keeping hot drinks hot for an extended period. However, I was disappointed when I lost the magnetic slider from the lid within two weeks. I hadn't realized how easily the slider could detach. Consequently, I had to purchase a replacement lid for my mug, which I use for carrying tea to work.

It keeps my drinks cold. When I drink iced coffee in the morning before work, I find that even after 8 hours, there's still ice inside. The magnetic slider is fantastic for easy cleaning; it can be completely removed and is super easy to reattach.

I bought one for my wife as a Christmas gift, and she adores it. It's a good size, holding a generous amount of coffee and keeping it warm for hours. It's comfortable to hold, easy to clean, and very well-made.

Excellent at maintaining the temperature of both hot and cold drinks.

I adore the vibrant, uplifting colors.

In every aspect, these are perfect. They're easy to clean, keep drinks chilled, come in a great selection of colors, and are well-crafted.

It fits snugly in my car's cup holder and stays in place.

It's light and comfortable to hold.

The quality is amazing. It keeps my coffee warm almost all day, is easy to clean, and looks great too.

I bought this as a gift for my significant other, but I also have my own coffee cup and water bottle, which I highly recommend. They're definitely worth the money, keeping coffee hot and water cold, whether it's the water bottle or coffee cup.

Before this tumbler arrived, we would hesitantly shuffle between the 5 tumblers we owned, none of which were particularly good at keeping our coffee hot. Then, this wonderful item arrived, keeping coffee hot for hours, with a perfect lid. I plan to buy another soon, so we don't have to share just one.

It retains heat well for hours, usually up to 3 hours which is how long it takes me to finish my drink. Conveniently, it fits under my K-cup machine.

It works wonderfully! I fill it with milk and an ice cube for my daughter on long car rides. Even after 3 to 4 hours, the ice cube remains, and the milk stays cold. I absolutely love it and plan to buy another one.