A question regarding a american mystery

[Kropotkin]

As Stuie already have pointed out; the plastic bag is in fact cheaper than the paper bag without handles.

[Buck Birdseed]

Originally posted by Demerzel
because sometimes I want cold water and sometimes I want hot?

Right, sometime in the sixties someone invented a reasonably cheap device called a "mixing unit" which allows you to, by correctly adjusting two taps or possibly a kind of lever, achieve a stream of water of any temperature from very hot to very cold, and, get this, everything in between. A pleasant temperature for washing your hands? Coming right up. The choice between ice cold and scalding hot is no more! Halelujah!