Flask has been produced from various metarials and used by humans for centuries. Any liquid that will not react with its material can be stored in it. Mataras are mostly made of plastic, glass, aluminum, metal materials.
Plastic flasks have some positive aspects. Firstly, they are easily accessible products, cheaper than the production of a glass and metal flask, which makes a plastic flask affordable. In addition, it is not shatterproof like glass or hard like metal, it is suitable for children. Finally, if the advantage of being transparent is used, we can see the liquid inside.
There are also some negative aspects of plastic flask. When harmful chemicals contained in plastic enter the body, they can cause diseases such as obesity, depression, and even increase the risk of various cancers. In addition, it poses a danger to nature.
In my opinion, it is the healthiest to use a flask made of stainless steel material. Because it is unbreakable, does not harm human health and nature.
Material and Technology 