When you shop for foundations and concealers, don’t just compare the prices. Also write down how many ounces they give you and figure out the cost per ounce to accurately compare prices. If you don’t do this, the prices can be deceiving. For example, Stila sells a foundation for $40 a tube, but it contains 1.4 oz. Most foundation bottles hold around 1oz., and some .5oz. The Stila foundation works out to $28.57 per ounce. Zhen makes a stick foundation that is $18 for .5oz. That’s $36 an ounce. Zhen’s other foundations at $15.50 and $22.50 per ounce are a better deal. I was thinking of trying L’Oreal’s cream to powder foundation for the summertime. It looked like a decent price until I noticed the net weight. It is $7 for .17 oz. That’s $41 per ounce for a drugstore product! I also suspect that I would use up a cream to powder faster than a liquid foundation. If you can, try to consider how quickly you will go through a particular formula. Beware though, salespeople will always tell you that their product lasts longer than others. My guess is that you would go through a stick foundation quicker than a liquid. You will also go through a liquid foundation faster if you apply it with a sponge rather than your fingers, because a sponge soaks up some of the foundation.