Jack Daniel’s or Jim Beam

[Aceospades]

Which company had a square shaped bottle first for their product?

[rsa]

Jack Daniel’s started using a square bottle in 1895.

http://www.jackdaniels.com/bottle.asp

I can’t find a definitive date for when Jim Beam first used square bottles. A bourbon review seems to imply that Jack Daniels was the first with a square bottle.

For decades, Jack Black and Jim White have jockeyed for standing as the best selling American straight whiskey. Jack, more so than Jim, has spawned a legion of imitators, particularly of its square bottle and simple white on black label.

http://pw1.netcom.com/~cowdery/articles/jdaniel.html