Question

milk being supplied in glass bottles,late in plastic bags and now in tetrapack and though vending mechine

Answer 1

    The packaging material is tetrahedron (pyramid) shaped plastic-coated paper carton.  The innovation was introduced by a company called “Tetra Pak” owned by Ruben Rausing and Erik Wallenberg.  It was in 1970’s in Sweden and Switzerland.

the reasons for choosing it are:

  1. It does an efficient packing regarding volume space utilization.  Its space utilization factor is 75%.
2. It is economical.  Glass bottles are expensive, need effort for recycling them, storage and sterilization.
3. It is an environmental friendly packing material.  biodegradable thick paper.  Plastic or polythene is polluting and non biodegradable.
4. It is hygienic.
5. Strong material, so we can pack a lot of them over each pack.  Polythene sheets are not strong for packing a number of them over one another.
6. Storage for a long duration.  Milk in Polythene loses /gains heat quicker.  Thick cardboard paper sheets are more insulating.

Answer 2

Selling of milk,first in glass bottles,then in packets ,then tetra packs and vending machines indicates how over the years the means of packaging have changed. This is done so as to reduce costs or improve the goodwill by innovating the mode of packaging. For instance, tetra pack keeps the milk safe for months and is made of paper and can be recycled. Similarly, plastic packets involve lesser costs and vending machines in itself have no packaging cost.