Question

Milk being supplied in glass bottles,later in plastic bags and now in tetra packs and through vending machine?

Answer 1

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.