The difference between tumblers and goblets came up recently. Here is the Oxford English Dictionary on the subject:
6.a. A drinking cup, originally having a rounded or pointed bottom, so that it could not be set down until emptied; often of silver or gold; now, a tapering cylindrical, or barrel-shaped, glass cup without a handle or foot, having a heavy flat bottom.
1.c. A glass with a foot and stem, as distinguished from a tumbler.
Marked ‘U.S.’ in the Century Dict,; but current in England in tradesmen’s price lists.
As you can see, a cocktail glass or a Champagne flute would be a goblet, while a highball glass or old-fashioned glass would be a tumbler – technically-speaking. That original tumbler design must have been fun, even though increased intoxication would have been the consequence!