Be it at breakfast, mid-morning in the office or during your afternoon coffee break: nothing beats a hot, aromatic cup of coffee or tea with that freshly-brewed taste. But how can these tasty hot drinks keep their flavour and stay at the perfect temperature? The right vacuum jug will keep coffee & co. deliciously hot even for up to twelve hours, giving you many moments of pleasure. So how does it work? We reveal all!
Vacuum jugs can be found in almost every home. With all sorts of designs ranging from traditional stainless steel to brightly-coloured plastic, they make a truly eye-catching addition to any laid table. The insulating action of these vacuum jugs keeps coffee, tea & co. tasting delicious and (most importantly) hot for up to twelve hours, so they are an absolute must for the office, at parties or when enjoying a coffee with family and friends.
Heat always flows from hot objects to cool objects – that’s what the second law of thermodynamics states. But how does the vacuum jug manage to prevent the temperature inside the jug from adjusting to the colder outside temperature?
By looking inside a vacuum jug with a glass liner, you will be able to see that the inside is a silver colour. The reflective surface inside the jug also helps ensure that less heat can escape. This is down to the reflective effect of the interior. With hot objects such as a vacuum jug filled with coffee, part of the heat is emitted by heat radiation. The mirror-like interior of the jug reflects this heat radiation and makes sure the heat is kept inside.
The EMSA vacuum liners keep beverages like coffee or tea hot and full of flavour for twelve hours. The liner consists of five layers: firstly, two layers of hardened borosilicate glass preserve the natural flavour. Then two additional genuine silver layers reflect the heat to keep the beverage perfectly warm. A vacuum layer is also included to provide additional heat insulation. But it isn’t just the interaction between the five layers that makes the break-proof liner so unique; it is also hand-blown and hand-made.
Why hot drinks stay the same temperature inside the vacuum jug:
A safe closure is another important criterion for a good vacuum jug.
Vacuum jugs: what different kinds of closures are available?
The EMSA vacuum jugs come with a wide range of closures:
Cleaning your vacuum jug: tips and tricks
Whether you wash it in the machine or by hand, prolonged use of the vacuum jug can result in coffee and tea residue accumulating in the vacuum jug, and this is sometimes also accompanied by unpleasant odours. These four tips, which range from quick fixes to more time-consuming solutions, will help you clean your vacuum jug so you will be able to use it for a long time:
All EMSA vacuum jugs, for example the AUBERGE Aroma Control or the ELEGANZA, are guaranteed for at least five years.
Feel like getting away from the daily grind? Have a large cup of tea – preferably from an EMSA teapot "Made in Germany". EMSA teapots will keep your tea hot for up to 12 hours and aroma fresh thanks to the aroma tea-strainer.
And by the way: Delicious tea leaves unfold their full aroma when brewed between
122 °F and 203 °F. Then, let the tea cool off a bit and enjoy.