"I would like two glasses of wine."
Translation:Ich möchte zwei Gläser Wein.
I am confused by this. My understanding was that when referring to quantities and measurements that there was a rule that says when there are two nouns together like this that and the first noun is masculine or neuter then it is always in the singular, even when the meaning is plural. As an example Ich trinke jeden Abend drei Glas Rotwein - Meaning I drink three glasses of red wine every evening. Could somebody help me understand where I am going wrong as I expected this to be 'Glas' and not Gläser'. Many thanks