30 oz Tumbler with Lid and Straw – Insulated Double Wall Stainless Steel Water Bottle with SIlicone Boot – BPA Free Dishwasher Safe Tumbler, Reusable 30oz Travel Cup Stay Hot Cold – Black

Great travel cup! Sturdy, well insulated, and nice looking
This quickly became my new favorite travel cup! I’ve been using it for my breakfast smoothies, and bringing it to work and rinsing it out to use for beverages throughout the day. It’s a nice looking cup that’s also sturdily made, and very well insulated. it keep my drinks cold all day long. Even if I forget about it and leave a drink in it overnight, it’s still cold the next day, with only minimal ice melting.The included silicone boot fits well and provides some protection and extra insulation to the base of the cup while still being easy to remove for cleaning.The handle is securely attached, being welded on with no visible seam at all. It’s also comfortable to hold. The opening of the handle has a good width, and the inner surface of the handle is slightly curved, which reduces the pressure points from the edges.Spill resistance is great too! I tested it by filling it with water and then turning it upside down. A small splash of water came out when I first flipped it over, but then it stopped almost completely, only letting out a drop or two every couple seconds. I had to hold it upside down and shake it to get more water to leak out, and even then it was a fairly small amount, just a little splash that would easily clean up with a paper towel.All in all a great cup that exceeded my expectations and immediately became my new favorite cup. Easy 5 stars.

Perfect for hot and cold beverages.
This tumbler is pretty much perfect for regular use. The lid screws on easily and the straw fits snugly into the top. It isn’t spill proof, but it is leak resistant. If it is knocked over it doesnt spill, but will leak a little if not picked up right away. I have used this tumbler for both hot and cold drinks. I plan to use it primarily for cold beverages. It is well insulated. I’ve left it on the counter in the evening and still had ice the next morning. I do wish it had come with an extra straw, but I’m sure I have an extra that will fit. I cant recall if it was supposed to come with a brush to clean the straw, but I didnt get one. I tried using this cup for coffee to put it to the test. It absolutely kept it hot. So well that I ended up dropping an ice cube in it so I could drink my coffee. I feel confident that it would have stayed hot for hours. The silicone boot that comes on it is nice and keeps it in place and also fits into my cup holder better. I definitely reccomend this tumbler.

Not water tight! Difficulties with Screw Top/lid! Too well made?
For such a precision top, I now am having difficulties screwing the lid on, and even greater difficulties unscrewing. It’s easy to cross thread when putting the lid on, and If you compress the gasket all the way when tightening, it is difficult to get it to release. I might grind some shallow dimples along the top edge to give me something to grip. It’s somewhat of a contradiction that the lid is so precisely made and tight, but because of the hole cover mechanism, it is still not water tight. The lid has the slide away cover for the opening, and that has a flap for inserting the straw. So if you tip this, you will get a small to medium puddle, but no niagra! (google it:) I find the hole in the top for drinking is too small. I’ll probably cut/grind a slightly larger opening. Like the handle and overall look. Also has a rubber like sleeve for the base. Chose white because by black cup gets so hot un-shaded. Happy hydrating!