🫗 Vacuum flask
Also known as: thermos, flask
Keeps the temperature: warm milk for a baby, coffee with milk on the go.
A vacuum flask is a container that keeps a drink hot or cold for a long time. It has two walls with almost no air between them — a vacuum. Heat barely passes through empty space. The walls are also coated with a shiny layer that reflects heat. Most heat escapes through the neck and the lid.
The vacuum flask was invented by the Scottish scientist James Dewar in 1892. He needed to keep very cold substances for his experiments. He did not patent his invention. In 1904, two German glassblowers made such a flask for home use and called it “Thermos”. The name became a common word for all such flasks.
A flask is handy for taking milky coffee or cocoa on a trip. Warm milk for a baby can also be kept in a flask, but not for long. Germs multiply quickly in warm milk. So it is better to fill the flask with hot water and make up the formula just before feeding.
How it connects to milk
🫗 Vacuum flask ← packed in ← 🥛 Milk
Links
- What is packed
- 🥛 Milk
Frequently asked questions
How does a vacuum flask work?
There is almost no air between its two walls, so heat hardly gets out. A shiny layer also reflects heat back.
Can you keep warm milk in a flask for a long time?
Better not. Germs grow quickly in warm milk, so for a baby it is easier to keep hot water in the flask and make up the formula before feeding.
Recipes
Similar
🪣 Bucket · 🍼 Baby bottle · 🫙 Milk can · 🫙 Carton · 🫙 Jug · 🫙 Milk churn