>>937523>Do you think these new stainless steel/plastic/silicone vacuum flasks have the same quality?They can flavor your beverage/food a lot of times. They are more durable. However, very few of them are designed with a rubber gasket between the inside liner and the outside liner that is separated with the vacuum insulation. Because of this direct metal to metal contact, those designs end up conducting heat in or out of the container. This vastly reduces the amount of time they can keep things cold or hot. The ones with a gasket to separate the inner and outer metals will out perform the glass models, but they are really hard to find.
The glass-lined ones never affect the flavor of the beverage/food and do not conduct the heat in/out anywhere near as fast. However, many people are rather clumsy and end up dropping the container, thus breaking it. Newer glass-lined products normally have thinner glass that is not borosilicate glass. Because of that, they can shatter when pouring hot liquids into them. The older borosilicate glass containers don't shatter due to that kind of thermal shock. Also, newer versions tend to have fewer or no rubber contacts in the bottom to prevent the inner lining from moving/jarring when banged or dropped. When those types are banged/dropped the neck of the inner liner tends to snap off. The older versions have 3-4 rubber contacts in the bottom which prevents the neck from snapping off.
Thus, I use a vintage, glass-lined, vacuum sealed carafe. The older ones are normally the best ones to buy online because they are easily researched and have already stood the test of time for durability and popularity. The newer ones are best bought in-store where you can hold it in your hand and examine it (ask a store rep to unbox it for inspection if you need to).
