I posted on another forum for someone that mention the price increase for less liquid using prices I found at that time including some sales:
Well, break it down and look at it this way.
BEFORE:
120ml, $47.50, $0.396/ml
36ml, $15, $0.417/ml
18ml, $9.99, $0.555/ml
6ml, $3.75, $0.625/ml
AFTER...