Alieoxon I know the answer to your one
. The bottles are labelled in this way so that when you take your glasses off to have a shower you cannot see which is which, which causes you to use the wrong ones in the wrong order eg Conditioner on hair followed by shower gel, which necessitates much rinsing and starting again, which in turn means that you use 2 or 3 times as much of the product, which means you have to buy it more often - Simples. 