G.O.P.
Use a large Mixing glass with Lump of Ice.
2 jiggers of Orange Juice.
2 jiggers of Grape Fruit Juice.
Fill with Seltzer Water.
Stir; ornament with Fruit and serve with Straws.
All fizz and no substance. Where's the BOOZE?
See also:
Kiddie Cocktail
Pick-me-ups