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home_cheese OP t1_ixv4t93 wrote

So I did test this against a Yeti. The guys at work all use Yetis and they SWEAR that nothing is better. Well one of our distributors dropped off some swag and I got my hands on a Yeti 14 oz coffee mug and a 20 oz tumbler identical to the ones the coworkers have. Time to test....

The Yeti handily lost even having the advantage of 4 oz over mine. I checked the temp every hour for six hours. In the end the Yeti was 48° colder. Both starting out at 208° with the Yeti finishing at 122° and the Zoji at 170°. The Yeti coffee mug is handy for around the house and I'll use the 20 oz for the odd occasion I forget my Zoji at work.

ETA - Both were tested having sat out the night before with the lids off. Ambient temp was 68°. Before taking the temp each hour each was inverted once to eliminate any cold spots as I suspect that the Yeti loses most of its heat through the lid.

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cherlin t1_ixvayru wrote

So what your saying is that after 6 hours your zoji was still too hot to drink? Mostly kidding, but really, some of these thermoses are too efficient at this point, you want to consume coffee around 135ish F.

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home_cheese OP t1_ixvhw6e wrote

At my job it can get pretty cold so it loses heat faster. Works perfectly for my situation.

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upvoatsforall t1_ixvjhun wrote

They were both left open? Does one have a larger opening than the other? Is one wider than the other?

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jafarion t1_ixvzxhs wrote

They were left open before the test started so they both had the same ambient internal temperature is what I understood.

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LikesTheTunaHere t1_ixwzuzp wrote

The zuri has a smaller opening and a smaller top surface area as well as its taller and not as wide.

I assume all of that plays apart with why zuri is BY FAR the best at retaining heat. The heat basically only escapes from the top and zuri has the least amount of liquid exposed. Also their lids are way more robust and thicker than everything else.

My Zuri I can put tea in it at about 4:45am and at 5:30-6pm its still very nice to drink.

I had to buy worse ones if i wanted to drink them on the way to work or around the house because even leaving the lid open wasn't good enough to have them cool off fast enough to a drinkable temp.

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ThatDarnScat t1_ixy1flb wrote

I have one. I make my coffee strong and put an ice cube in it to get it down to just above drinking temp. It's perfect. If I don't do that. I have to leave the thing open for an hour or so before I can drink it.

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a11en t1_ixxzfoc wrote

Hahaha. Yes- I agree. I don’t dare try to drink the coffee on the drive anymore! I’ll be swearing and might spit it out all over the wheel to save my tongue. Rofl!!

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AuxiliaryPriest t1_ixytwb0 wrote

I read that as 5:30- 6 AM and was thinking how hot do you need to have your teas to be drinkable.

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BoyLilikoi t1_ixwjgun wrote

It’s true. The Zoji retains heat so well it can be dangerous to drink straight from it but I prefer to pour into a cup from my thermos anyhow and for that purpose it is great.

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LikesTheTunaHere t1_ixwzxbp wrote

If you close the lid on them, at 6 hours its still hot hot. I had to buy cheaper\crappier ones so i can actually use them at home or drink them on the way\shortly after getting to work without having to leave the lid off forever before hand.

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citylimits- t1_ixwid80 wrote

No kidding I went deer hunting the other day and forgot my cup I couldn’t drink my dam hot cocoa till 10am, I made it at 4am. It was in a yeti rambler, I don’t need more efficient.

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FuckWit_1_Actual t1_ixxoii2 wrote

I make my morning k-cup coffee straight into a yeti and then leave the lid off for 10ish minutes just so I can drink it on the way to work.

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ThatDarnScat t1_ixy1lpt wrote

Get it to drinking temp before you put it in. Then the efficiency is working for you. I make my coffee strong and put one ice cube in it. I have it down to a science where the icecube is a very specific size and it gets it to perfec, ringghhtt above drinking temp, and its perfect when I get to work.

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bookclubslacker t1_ixxeiff wrote

Yes I have to cool my tea before putting it in my zojirushi or it’s undrinkable until mid afternoon.

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a11en t1_ixxzbg9 wrote

Dude- first time I tried to use my zojirushi just like the OP’s- I almost had a car accident I had filled it at like 6am, and at 11 I thought- good to go. Rofl. I was wrong. Rofl

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Iron_Chef_Boyardee t1_ixwa002 wrote

This isn't surprising. The tumblers have single wall plastic lids compared to an air tight and insulated lid on the Zojirushi thermos, and they're meant for different use cases.

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LikesTheTunaHere t1_ixx0el6 wrote

The zori also has a significantly smaller amount of surface area on the top that is able to lose heat.

I've spent too much time trying to figure out the perfect and best tumblers\insulated containers.

The old school stanley\thrermos's are also the same with the tapered top but zori took it farther since with "only 160oz" you can easily make the cup a bit taller, bit harder to make a 30oz one even taller.

My zori big container (1L) holds hot water for significantly less time even if i keep the lid closed the entire time compared to my normal one but the lids are both just as absurd. However the 1L is much much wider.

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Dudeinminnetonka t1_ixx31os wrote

I picked up a thermoflask at Goodwill last week and am so impressed with it, it keeps my coffee hot for hours as opposed to minutes in my old plastic jumbo mug, any thoughts on the thermoflasks? I only paid three bucks

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LikesTheTunaHere t1_ixx35lp wrote

Same as everyone's flasks they paid way more for as almost all of them are almost the same.

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Active_Engineering37 t1_ixwcing wrote

the lid is crucial for insulation for yetis. Test again with lids on both and report back for science? I am curious because I have always been satisfied with yeti, besides the price tag. Always looking for other vacuum insulated cups and such because from what I understand that's what really helps. Found some vacuum insulated cups but the base isn't vacuumed, so they float upside down when submerged, and they don't work as well because of that air bubble but still work okay.

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home_cheese OP t1_ixwcyjk wrote

That was tested with the lids on both. I think the Yetis lid is where it loses so much heat because it is a single layer piece.

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One_for_each_of_you t1_ixwejc1 wrote

Bruh, the day before he did the test he left the lids off both to get their internal temp the same as the ambient temp. During the test both lids were on.

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LikesTheTunaHere t1_ixx0iw3 wrote

The Yeti lid compared to the Zori is a joke, like a literal joke.

The zori lids are several inches thick

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Bro_Code_Number_1 t1_ixwiesc wrote

I have the 10oz one for my coffee. I have to put two ice cubes in it because it keeps the heat so well. Lol

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ThatDarnScat t1_ixy1qpk wrote

This is the key. No need to use an inferior product because you don't know how to cool a drink off before you put it in your tumbler :P

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alexaxl t1_iy6zpk2 wrote

Wirecutter did this test already. :)

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