How to Say "glassful" in Spanish
The Spanish word for “glassful” is “vaso” — A2 level. This is a very common word in everyday Spanish.
English → SpanishA2
nounA2
a full measure

Examples
Bebió un vaso de leche antes de acostarse.
He drank a glass of milk before going to bed.
Debes tomar ocho vasos de agua al día.
You should drink eight glasses of water a day.
Using 'de'
When 'vaso' refers to the amount, it is almost always followed by the preposition 'de' (of) to specify the liquid: 'un vaso de cerveza' (a glass of beer).
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