DCHP-1 Online
tide line 
a line etched near the top of a glass for use in a beer parlor, intended to show the level to which the glass must legally be filled.
- 1965 The tide line, introduced in 1959, will be broken by the initials LCBO.
- 1965 The tide line, introduced in 1959, will be broken by the initials LCBO.