SF Buttacup Lettering SF Buttacup Lettering ver 1.0; 2000. Freeware. SFButtacupLettering SF Buttacup Lettering is a trademark of the ShyFonts Type Foundry. ShyFonts Type Foundry ShyFonts Type Foundry SF Buttacup Lettering is a trademark of the ShyFonts Type Foundry. Named by Carly Cohen. http://www.shyfonts.com/ http://www.shyfonts.com/ SF Buttacup Lettering.ttf