Viết 1 bài văn thuyết minh về cái phích nước ( 2-3 trang, không chép mạng)

Opening
A familiar item in every home is a thermos to store water, keep heat, and keep cold
Body
   Types of thermos: thermos has many different types and designs, not only to keep hot but also to keep cold. There are large, small, high, and low in different sizes. The large one can hold 2.5 liters of water, the small one can hold 0.5 liters of water. In addition to the usual keep warm type, there is also a cold keeping function.
Material, substance
The shell of the thermos is usually made of iron or plastic, the body of the thermos is made of plastic. The handle of the thermos is the same material as the shell. The handle is made of plastic and the button is made of special plastic to keep the water warm. The thermos plugs are made of plastic and some are made of glass.
Preservation of thermos
Clean the thermos into a little hot vinegar, close the lid tightly, then use force from the outside to shake gently and leave for about 30 minutes, then rinse with cold water to filter out the residues inside.
Keep out of reach of children to avoid burns to children.
Avoid strong impact with hard objects that can damage the thermos
End :
A thermos is a useful thing, no matter what shape it takes, it is the most convenient and the best.