I haven't tested it for more than 20 minutes or so, but I believe that Sharp Straw only drops half spirit hearts if you have no red heart containers, and drops half red hearts if you have at least one red heart container. Can someone confirm this, so we can add it to the page? --Drab Emordnilap (talk) 14:34, 25 May 2018 (UTC)
Binding of Isaac: Rebirth Wiki