GRUMBLOTCH'S SALTS
These are not soluble in lemonade, as clarified in The Awdrey-Gore Legacy. They are, however, most likely toxic.
Pale crystals poured from a chipped glass jar, emitting a brittle whiff of bitter almond and cinnabar, swirling, undissolved, into sugar-clotted lemonade.
Artwork courtesy of the Edward Gorey Charitable Trust.