Dimenson Shampoo was probably the first "two in one" shampoo to hit the market in the early 80s! The advert showed two girls going into a shower. The first girl has two bottles (shampoo and conditioner) but the second girl has just one bottle of Dimension with the tag line: "Why take two bottles into the shower?"
Dimension Shampoo had a very strong smell (although not unpleasant) and I seem to remember it originally came in an oval shaped bottle that was yellow.
Do You Remember Dimension Shampoo?
Do You Remember Dimension Shampoo?