Could not find the old thread and didn’t ‘favorite’ it, so i’ll start a new one.
Cold coffee is ok, but the Nissan’s sounded like the outperform my UnoVacs and Stanley’s by quite a bit, so I’m feeling that new thermos’ for daddy is Santa’s order.
Couple of questions:
1. Handle models or bullet models?
2. Does the 48oz food model work?
I have had a Nissan bullet thermos for many years and its the only one I have left.Keeps coffee really warm (not hot) much better than any of my other brand name ones ever did.Mine came with a neoprene sleeve the thermos slides into. Its been dropped and kicked around in my boat, snowmobile and in the ice shanty many times and still works like the day I got it.
Quote:
Keeps coffee really warm (not hot) much better than any of my other brand name ones ever did.
I’m wondering if they did this with an increased amount of vacuum or some other method. Wish i could afford to postmort one of them…
It is the vacuum or airless space between the outer wall and the inner wall of the thermos that is supposed to keep cold from penetrating thus keeping a hot beverage hot longer. I suppose the reverse would be true in keeping a beverage cold as well.
i’m thinking that there are GRADES of vacuum and VOLUMES of vacuum that might be different…
I would guess that you are correct. I suppose quality of the materials and the size of the vacuum space etc… would all factor in. A sleeve around the thermos i.e. neoprene is also supposed to help quite a bit. The Nissan thermos gets consistently rated high more than likely for the reasons you’ve expressed.
The size of the vacuum space doesn’t really matter, it’s the quality of the vacuum that does. The fewer atoms in that vacuum space, the fewer atoms that can transfer energy back and forth between the outside and the inside.
I use an old dewer from work that we used to use to transport liquid nitrogen. An almost perfect vaccum. We got a larger one recently and they were just going to throw it out. It’s rated to keep liquid nitrogen liquid for 200 days. I could probably leave hot coffee in it for a few months and still drink it hot.
They cost like $500 though.
I got the Nissan bottle and travel mugs from Cabelas and they work so well I bought the wife and kid each one for xmas last year.I just picked up the spill proof mug to carry when I don’t want to carry the thermos.
and probably not too portable!!
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