Who remembers the original advertisment for Cadbury Chocolate?

 I'm referring to the one for the Family Size block, meant to be shared by a family, but I can easily eat one of those on my own, though I no longer do that. 

The advertisement stated "there's a glass and a half of full cream dairy milk in each block"

Come back to the future with me now, and here's what they are stating: "there's a glass and a half in each one"

Here's my question: A glass and a half of what?

Since they are deliberately not saying I wonder if it is lite milk? skim milk? soy? palm vegetable oil? 

All I know is it doesn't taste the same as the chocolate I grew up with and hasn't since the mid 90s (last century! does that make you feel old?) when very briefly palm oil was listed as an ingredient (until everyone and her grandma got up in arms about the rainforests and gorilla habitats) and to me the chocolate, especially the chunky snack bars, tasted strongly as if someone had forgotten to clean the oil off the machines that processed the stuff. 

Then the labels had vegetable oil listed instead and it could no longer be tasted (by me anyway) but I haven't bought Cadbury Chocolate since 1997 and never will again.