Vintage Federal Law Flask Glass Bottle

Vintage, glass flask design bottle with rusted lid (never opened by me). Has "Federal Law Forbids Sale or Reuse of This Bottle" written on one side with 84®5 on the lower left, a 6 on the lower right. Other side has "Half Pint" on the lower middle. Bottom has R-162 on it. Has a little dirt/rust on the inside. 6 1/2"high x 1"d x 3 1/2"w. Very Fragile.