the answer is it gets it colder
A flask :)
Yes, both a thermos and a glass cup can help keep liquids hotter for longer periods of time compared to a regular open container. This is because they have better insulation properties, reducing heat transfer between the liquid and the surrounding environment.
Plastic generally does not keep liquid hotter than a foam container or glass container. Foam containers have better insulating properties, making them more effective at retaining heat. Glass containers also have higher thermal conductivity, which can help keep liquids hotter for longer periods compared to plastic.
In chemistry........I'd have to say a beaker.
Flask
The homograph for a glass container and to rattle or shake is "jar". It can refer to both a container used for storing food or liquids and a sudden jarring movement.
A glass lab cup is commonly referred to as a beaker. It is a cylindrical glass container with a flat bottom and a spout for pouring liquids. Beakers come in various sizes and are commonly used in laboratory settings for mixing, heating, and storing liquids.
To avoid splashing and losses of solution.
If you are using wood, metal, plastic, or a thermos it would have to be a thermos because inside of it there insulators. Insulators are used to keep whatever is inside the same without the stuff outside interfering. Why else do you think we drink hot coffee in a thermos.
Beakers hold solids or liquids that will not release gases when reacted or are unlikely to splatter if stirred or heated.
it is a container made out of glass that you can put things inside
Hot cocoa will stay hotter for longer in a glass compared to a styrofoam cup because glass has better insulating properties than styrofoam. Styrofoam is a poor insulator, allowing heat to escape more quickly.