The story
From blue + top, from the conventional colour of milk bottle caps.
Etymology from Wiktionary, CC BY-SA 4.0.
blue top
Today it means: whole milk or a bottle thereof. Full definition →
Today it means: whole milk or a bottle thereof. Full definition →
From blue + top, from the conventional colour of milk bottle caps.
Etymology from Wiktionary, CC BY-SA 4.0.