Even without a lid, these double-walled stainless steel containers are amazing. I have a few regular-size coffee cups that are made this way, and they keep coffee steaming hot more than twice as long as typical ceramic, glass, and plastic cups. From a topological standpoint, these containers are a sphere, with the top half pressed into the bottom half without touching it; the only place the inside and outside are connected is the top rim. The 'insulator' is the air space between them. Several years ago I cut one open to see how it worked. The one I sliced open had a little metal button spot welded to the inner surface; I think it's a different alloy that reacts with surface of the stainless steel to prevent internal corrosion because it's permanently sealed.
This is one of those instances in engineering where the designers are using a specific material because it has properties that are really bad. Thermal conductivity of plain steel is not so good. Add nickel and chromium to the alloy (stainless steel) and it becomes even worse. The temperature of the contents and the temperature of the ambient atmosphere take a long time to equalize because heat or cold has to creep over the very small area of the rim of the container for that to happen.
Post by rok-a-bill-e on Jul 4, 2020 17:28:50 GMT -5
I also got one as a gift from my son! And I don't mind one bit about the relative high price for Yeti and not because I didn't pay for it. He proudly said "I got you a Yeti"! He wanted to get me "the best" and I love that. And, it's a great thermal mug.
i was introduced to the ozark trail version and use the big mug for coffee. i fill it in the mornings and it stays drinkably warm to way after lunch. the i have the tall glass that i begin happy hour with and it keeps things cold until i'm finished being happy.
we bought their cooler and it will keep a block of ice for days if you keep it out of the sun.
i wasn't aware of the yeti brand until later. it's like instruments, some of the "knock offs" are so good i wonder what the real thing is like and is there enough difference to justify the extra $.
Play it with emotion and play it strong. Don't make a face and they won't know it's wrong!
Post by rok-a-bill-e on Jul 7, 2020 10:10:31 GMT -5
Yeti was an innovator in high performance ice chests years ago so on one hand I hated to see them undercut by Chinese knockoffs, but then they became this stupid status symbol with stupid prices to match and I'm glad that there are affordable alternatives.
By coincidence, there is a news story in the UK about an ultra high end travel mug. The offending beverage receptacle was pictured on the desk of our Chancellor of the Exchequer as he prepared his latest budget statement.
Apparently the smart mug allows you to set an exact drinking temperature and keeps it there for up to three hours, so your coffee is never too hot, or too cold. The 355ml mug is apparently dishwasher safe and even includes a charging coaster. All for the very reasonable price of £180.