Aluminium cans

Approximately 1 billion are produced in the USA each year. The first can was designed in 1958 by Kaiser Aluminium. This metal proved ideal as it was a lightweight, flexible material that allowed manufacturing of the bottom & sides of the can from a single sheet, leaving the top to be added after the can was filled.

The first cans were opened with a separate opener but this was inconvenient so Ermal Fraze designed a small lever attached to the can which was removed as the can was opened.

The design was workable but after a while it created an ethical dilemma:

The main disadvantage of this kind of taps was it could cut the fingers while they open the can . There are other dilemmas like throwing the taps on the ground . Because it is small people ignore throw it on the trash . In the end you will see a lot of taps on the ground   

 

So in 1976 Daniel F. Cudzik invented a simple, stay-attached opener of the sort familiar today.

As improvements were made in the design & production of aluminium cans, various  ethical problems arose concerning:

a.      Human safety:

The bottles are more healthy because the glass doesn't react with the drink   

Aluminums cans can make fingers injuries with the sharp edges 

b.     Environmental pollution:

                    Cans and bottles both are recycle.  But the  the glass doesn't react with time as the aluminum cans  

c.      Convenience:

          

                      Its not comfortable to drink with the fixed tap on the top of the can . Which could hit the nose . The new kind of taps comes with small hole which convinces with some people   

d.     Money:  

The aluminum is cheaper then class bottles and easy to  get rid of it. Unless refilling the  glass bottles they will be cheaper then aluminum.