Review on Rettebovon 30Oz Stainless Steel Tumbler Set With Straw Lid And Handle: Vacuum-Insulated Travel Mug For Hot And Cold Drinks, 7PC Bundle by Amy Mears

I have had it for 28 hours so I may need to return for updates. Its not my first stainless steel tumbler but its a new company for me. It looks same as others until you get to the lid. Its TIGHT! Extremely tight getting it on which is great - less chance of spills. There's a small opening in the center of the lid with a silicon cover for using a straw. I like this idea because its size is small enough that it will keep the contents cold. I added mini ice cubes to the tumbler, added water, applied the lid, turned it upside down over the sink and NO LEAKS or SPILL.So far I am extremely pleased. I keep iced cold fluids by my bed all night long and sometimes there's no ice hours later. Make certain that the center vent or the sipping opening is not covered when putting the lid on because the pressure will interfere with this.