Radiant Concentrated Watercolors are available in 1/2 oz. and 2 oz. bottles.
I purchased Dr. Ph Martin Radiant Concentrated Watercolors. I have been working with either cake or tubed watercolors of various brands. These were vibrant, and very easy to work with. Also, I ordered similar supplies from another on-line dealer at the same time. I received my supplies from Tex Art Supplies much quicker than those from the other dealer and at a lower cost.