I dare swear you won't guess-The sillabub, ha, ha, ha.
"The Double-Dealer"
William Congreve
Mary Magdalen salvaged a fine china sillabub stand, with little white-and-gold covered cups on it, from a sooty box under a kitchen cupboard.
"A Woman Named Smith"
Marie Conway Oemler
I find in his diary references to these drinks: Ale, beer, mead, metheglin, tea, chocolate, sage tea, cider, wine, sillabub, claret, sack, canary, punch, sack-posset, and black cherry brandy.
"Customs and Fashions in Old New England"
Alice Morse Earle