Attractive… but a modern repro I’m afraid.
There are six documented Columbia flask designs, produced in pint and half-pint in either blue or olive green, but none of them look like that.
The Union Glass Works Company of Kensington (Philadelphia) PA seemingly first made them in 1841 (some of them carry a ‘Union Co’ mark) but there may have been other makers in that area. They all have the American eagle clutching thunderbolts and olive branch on the opposing side to Columbus. Your flask also has the wrong kind of lip on the neck, none of the imperfections seen on the original flasks, and is unnaturally garish in colour.
If it had been an original, it would have substantial value. The reproductions generally date from the 1950s through to recent and have been produced by a number of companies. Cleavenger Brothers of Williamsburg NY and Wheaton of Millville NJ are sometimes cited, but others produced them too, for sale in gift shops as home décor.
