Why is shampoo and conditioner sold in the same sized bottles?

when you typically wash your hair twice while only condition once?Why is shampoo and conditioner sold in the same sized bottles?
I guess you have your answer with the answers already posted-- some people use more shampoo than conditioner and some use more conditioner than shampoo. Personally, I use more conditioner. I agree with the other answers that most people don't wash, rinse, and repeat. That repeat thing is a marketing tactic to get you to use twice as much shampoo.Why is shampoo and conditioner sold in the same sized bottles?
why do you wash your hair twice? you really should only wash your hair 2-3 times a week-washing too much strips your hair of its natural oils...%26amp; I don't know about you, but I generally use more conditioner than shampoo...
I always wondered the same thing!! I will have to keep checking back and see if anyone can answer this question.
not really
Most people only wash once, no need to do it twice. I also find that I use my conditioner faster than shampoo.
well alot of people dont do that, so then that way they will run out at the same time so its just convenunt
Maybe because even though you shampoo your hair twice, you use more conditioner than shampo.
Ok well for people with curly hair like me i use more condition becuase shampoo dries my hair out even more so i use tons of conditioner. In my opinion conditioner is way more important than shampoo!