Designer unknown. Shown by Lettergraphics as Mystery Caps [Lettergraphics 1976]. Appears as Grog Caps in Solotype’s Special Effects and Topical Alphabets (1978). Also shown under that name by Castcraft [Castcraft 1978] and Typeshop [Typeshop c. 1977].
Various rough digitizations include Grog Caps (Traitor Vic, 2009) and Cake Frosting (Neil Van Ess, 2006). None are recommendable.