A stainless steel tumbler with a vacuum insulation structure that keeps drinks at a "delicious temperature". When I searched for it this summer, I found that the original products of the general store were sold at a fairly reasonable price.

But can this be used as good as the products of major manufacturers? I can't afford to buy cheap goods ...? I was curious, so I compared it with the thermos of "Speaking of vacuum insulation".

Player introduction

This time, we prepared three products: Thermos "Vacuum Insulated Tumbler", Nitori "Stainless Mug that does not easily condense", and CAINZ "Magic Tumbler". The capacity is 420 ml for thermos, and the other two products are almost the same size as 430 ml. The price of Nitori and CAINZ is almost half that of Thermos.




All of them have a vacuum insulation structure, which makes it difficult for heat to be transferred from the inside to the outside, and keeps the temperature of the contents as they are. By the way, there was a description * that the thermos had a cold insulation effect of "7 degrees or less (1 hour)". It looks pretty tough. * Water temperature when water of 4 degrees or less is added and left for 1 hour at room temperature of 20 degrees ± 2 degrees

Cold water

First of all, take a look at the cold water. I poured 350ml (11.83us fl oz) of water from the water server at around 10 degrees and left it.


When measured one hour later, there was no significant change at around 11 degrees. It is a pleasant coldness when I drink it.

Iced coffee with ice

Next, verify with iced coffee with ice. I put rock ice in about half of the tumbler, put 200 ml of iced coffee and left it. Its temperature is 2-3 degrees. It's cold ...!



After 1 hour, the size of the ice was almost the same. There is no condensation on the surface, so there is no need to worry about ring stains on the desk.



After leaving it for another hour (two hours after the start), there are still lumps of ice left ... In both tumblers, the coffee temperature is below 1 degree, rather lower than it was at the start! I simply enjoyed the extremely cold iced coffee with almost no diluting. It's super excellent.

CAINZ for cospa

There is almost no difference in the verification of the range that can be done at home, and it seems that CAINZ's cost performance is the best simply considering the price (In addition, when verified with hot water of 76 degrees, all three companies are about 45 degrees in one hour. It has dropped to. It seems that the cold insulation effect can be expected). In terms of performance, it is difficult to attach to the other side, but only the thermos has a thin edge and I was a little worried about the mouthfeel.


So at the end, I will have a beer with CAINZ's tumbler. By the way, the beer, which was about 10 degrees when put in, was 11 degrees even after 1 hour (the one left in the can is 20 degrees). Beer that doesn't get slimy forever is the best. In conclusion, if you don't have one, buy one stainless steel tumbler right now!