The BlackLantern Hat is a unobtainable hat in the PFS store. It's just a pumpkin with green and black colors.
Unconstrained with its sinister looks and laughter, this was the ideal present. It's just that somebody forgot to package these before Halloween and instead these were sold during Christmas at thrift shops.
In later years, these would be capitalised. The neon-like contrast between the hollow green and the outer black made this stand out from others.