Rock Island and Pacific Railroad glass milk bottles. Macomb Dairy glass half pint milk bottle from Macomb Ill. and bottle has Sealed O S half Pint Liquid 2 MLX37928 REG. around the bottom edge and base reads 9 65 shows no signs of wear and measures 5 3/8" tall. The Rock Island milk bottle has Rock Island logo printed in red on every other side on the four sided bottle. Base edge of bottle reads: Sealed O LS Third Quart Liquid 2 MLX 942 REG. with base saying Duraglas 17 58 with X