Monthly Archives: June 2015

Care and Use: Stainless Steel Vacuum Flask

Cleaning and care of steel vacuum flask need to happen in order to maintain the shine of the item, as well as keeps your tea, coffee or water free from any bacteria or germs. Un-cleaned flask can lead to unhygienic conditions that may further leads to health issues. Proper care and cleanliness is required, to ensure long term usage of the flask. In order to keep the flask fresh and clean, you need to bear a few things in mind. Try not to store the liquid in the flask for more than one day, especially milk based drinks, which carry the risk of fermentation, which can lead to a bad taste. If you forget to clean your flask right away, there are some things you can do to sterilize it and get rid of any debris in there.

Flask cleaning made easy!

The thin and portable, stainless Steel flasks are designed to be handy. This design is great for individuals who essentially have to carry it around, but can also make cleaning them a little more challenging and a tedious process. The tapered opening makes it pretty much difficult to get a rag or a squeegee inside, and cleaning the flask without the scrubber is even more difficult. Opportunely, you do not essentially have to use a brush to clean out your stainless steel vacuum flask, there are few other useful ways, that can keep your flask, very neat, clean and odor free, without the usage of any sort of harmful chemicals or liquids.

Keep it Clean

The acidic and healthy, white vinegar can be used as a cleaning  agent. Safe to use and just needs to be poured into the flask and shaken rigorously. The most important step is to rinse out your flask with water, properly. Leave your flask open for it to completely dry out as any white vinegar remains can destroy your drink. Also, hot water can be used to clean the stainless steel vacuum flask (, just pour this water into the flask carefully and avoid it touching your hands. Lemon juice on the other hand is very acidic and does a good job of cleaning out a dirty flask; just do the same as you would do with white vinegar. You do not want to leave any trace of lemon juice in there because it can ruin the taste of your drink.

Safety at its best!

You must be very careful, particularly while pouring hot liquids into and out of the glass lined flask, make sure that it is held properly and the lid is opened only a per the requirement. It is all the more important to make sure that you check the lid of the flask and ensure that it is properly closed, so as to avoid any spilling or leaking of hot contents. In the interests of well-being and sanitation, you must please see that your flask is cleaned with warm water and washing-up liquid prior to the initial use, make sure that you do not pour your drink into the flask right after you buy it!

Use it right!

To keep your drinks at the right temperature, before filling in the flask with the drinks, you can pre-fill it for a few minutes, using either hot water, to keep hot drinks, warm for a longer period of time or cold water, to keep the drinks absolutely chilled. Never be in a hurry to re-heat or heat the contents of the flask, by putting the flask itself into the microwave. There may be a time, when your flask would have been un-used for quite some time. In that case make sure, that you re-use your flask only after thoroughly cleaning it with warm water to avoid any dirt or odor. Overfilling the flask can also lead to leakage, you must leave adequate space in the neck to fit the lid. To prevent any sort of burning, you should always pour contents from the flask into a mug or glass, rather than drinking directly from the flask. Your stainless steel flask is designed to be very durable and extremely lightweight yet tremendously strong. If you take care of your flask, it may very well last for a very long span of time. Just follow the above mentioned few tips to help keep your flask fresh and clean.

Glass Lined Vacuum Flask – 5 Features to Look For

Glass lined flasks are our greatest buddy in the chilly winters and scorching summers. These vacuum flasks keep liquids at a steady temperature. For example, if we pour hot coffee in the flask and seal it, it will remain hot for a long time and similarly, chilled lemonade will stay cool for longer duration if kept in a vacuum flask. But why would we want hot or cold drinks on the go? The thing is that we humans are warm blooded beings and we need to keep our body temperature regulated at nearly 37 degree Celsius. This is the reason why we crave for hot beverages when the outside temperature is below our desired level. Hot drinks help us maintain and increase our body heat in cold temperatures. And this also works in the reverse; when we feel hot, we like to drink cold beverages to lower our body heat.

What are Vacuum Flasks?

Vacuum flasks are also called Dewar bottles or thermos. They are insulated bottles that keep the contents inside at a stable temperature for a long duration of time, irrespective of the surrounding weather conditions. It was invented in the year 1892 by Sir James Dewar and consists of two flasks. One flask is placed inside the other and the air is partly removed from the space between the flasks, generating a near-vacuum, which checks on the heat transfer by conduction or convection.

How do Vacuum Flasks Work?

What will happen if you take a glass of chilled ice tea or a cup of steaming hot coffee and keep them out on the kitchen table? While your coffee will cool down, the ice tea will warm up to the room temperature. This is because if you place any two items with dissimilar temperatures, then the heat transfer will occur and result in both the items to reach the same temperature. Basically vacuum flasks prevent this heat transfer through the walls of the thermos flask.

Five Features of Vacuum Flask to Look Out For

1.  Silver Interiors

You must have noticed a glass casing inside all your vacuum flasks ( This casing is very fragile. It is surrounded by a vacuum and is protected with an outer plastic or metal casing. Usually, you can unscrew and take out this glass envelope for cleaning purposes. Moreover, to decrease infrared radiation, this glass casing is also silvered like a mirror. This entire arrangement of a vacuum and the silver interiors diminishes the heat transfer to a great extent.

2.  Vacuum

Vacuum means the complete absence of atoms in an area. While it is impossible to achieve a complete vacuum, but by removing a major part of air between the two compartments of the thermos, an almost vacuum can be attained. In the absence of these atoms, heat transfer through conduction and convection can be totally eliminated.

3.  Insulated Support

Sometimes large quantities of liquid needs to be stored for temperature maintenance and for this a large and long vacuum flask is used. However, these huge flasks cannot hold the inner container completely just from the neck alone. To solve this and provide better stability, additional supports called spacers are placed between the interior and exterior casing. These spacers also work as a thermal conduit and partly decrease the insulation of the thermos around the region where these spacers link to the interior shell.

4.  Cap

While the walls and bottom of the flask offer proper insulation and prevent heat transfer, the neck or the opening of the thermos does not offer any vacuum. This can affect the temperature of the contents in the flask. To minimize this, a cap or screw-on stopper is used to block the air flow and also to prevent the contents from spilling.

5.  Outer Casing

Though the outer material of the thermos does not play a major role in its insulation effect, but it is still a very critical feature of the glass lined flask. It is very essential that the outer shell of the thermos is made of high grade plastic or metal; otherwise it might crack and shatter unexpectedly. Moreover, the outer casing comes in various colors and designs and you can choose the one that suits your personality and taste.

So, keep these features in mind and go ahead and buy some great glass lined vacuum flasks to beat the heat or treat the winters this season!