There's no question the Wonser's is one of the all time favorite bottles for collectors in the west and east alike.  With it's unusual shape and often very crude texture, these beautiful bottles come in aqua also.  In addition we've seen the amber whiskey top variants in pure green and even yellow!  What an eyeful!  For more information on how this bottle came about, check the various bitters books out there, The Best of the West Antique Bitters Bottles would be a start.  For its unusual design, often crude patina and a multitude of colors, the Wonser's U.S.A. Indian Root Bitters is our bottle of the month.