CS COSDDI 12 oz Stainless Steel Vacuum Insulated Tumbler - Coffee Travel Mug Spill Proof with Lid -

Love this Cup! It’s a perfect size. I was really excited about it being leak proof so I turned it upside down and it instantly spilled BUT that was my fault. I didn’t realize the mouth piece has 2 clicks. One for just gently closing it to keep the heat in while drinking and one to actually lock it. One I figured that out 10/10. Keeps my tea hot and no bad taste. Color is so cute. Exactly like picture Read more

This is a great coffee tumbler. My daughter got this for me in mint green and I bought 2 more as gifts for the holidays. The insulation of it keeps your coffee hot for a long time and its a great size. For me it's perfect for work because I get distracted and usually my coffee gets cold right away. I recommend it and the price is reasonable. Read more

The customer service is EXCELLENT! I love this travel mug for coffee. It's a perfect size to fit compact/travel coffee makers (I use Horavie) and fit in my purse or my everywhere-bag without the fear of leaking (be sure to tighten lid COMPLETELY.) I've used it many time for a functional mocktail/cocktail shaker. The drinking opening in the lid holds the ice back when pouring and the tightened lid prevents leaks when shaking. The stainless steel promotes the chilling and I can use it as a non-breakable tumbler for poolside. Read more

Great travel mug for keeping your drinks hot. Fit in cup holder great, and overall a wonderful mug. Only 4/5 stars because the paint does begin to chip over time. Not too big of a deal, as the mug is still usable and good. Read more

Well made mugs. For in the car cup holder and. Hold the temperature very well. Excellent value for the price! Happy with the purchase. Read more

I bought this tumbler over a year ago and decided to buy another one. I like everything about it but most of all it didn't leak. The lid has a small flip over cover that snaps into place never leaks. This new one was slightly different. The flip closure did not snap closed. When I turned it over and water poured out in a small stream. I decided to fill it with hot water to see if the lid material would soften and mold itself to seal. I made sure the cap was firmly screw in, closed the flip cover firmly on the lip, then turned the mug over. Water came out again but then slowed to a trickle and eventually stopped. The next day, same test, leaks about 2 drops per second. Both old and new kept hot liquids hot. Started with 207 degree hot water. One hour and 15 min later about 147 degree. Still hot enough. I like the tumblers. I have confidence that one will not leak either while in the cup holder while driving or in my gym bag ( would still place it in a medium plastic bag ). The other one that leaks, place in a cup holder or in your hands only. Read more

I’ve been using this 12 oz stainless steel tumbler for a couple of weeks now, and I’m genuinely impressed. It keeps my coffee hot for several hours and my iced drinks cold even longer — perfect for commuting or long workdays. The design is sleek and minimalist, and the black finish looks very stylish. The size is ideal for fitting in my car cup holder or tossing in a bag. The lid seals tightly and is truly spill-proof, which I appreciate because I’ve had no leaks, even when the tumbler tipped over in my backpack. It’s also super easy to clean, and the stainless steel interior doesn’t retain odors or flavors. I’ve used it for coffee, tea, and even a cold beer — all worked great. Highly recommend this mug for anyone who wants a reliable, portable thermos cup that looks good and actually works. Tip: Preheat or pre-chill it with hot/cold water for a minute before use to get even better insulation performance. Read more

Cup is the perfect size for travel and car cup holders, keeps beverages hot, and has a spout that is big enough and sanitary (cover for spout). However, it is not even close to spill proof. If knocked over liquid sprays out from various areas. If you don’t care about it being spill proof, it’s a good cup. Will be returning Read more