look's like a liquid smoke bottle from the 1950s or 1960s . or even the 70,s not much of a collectable . http://www.glassbottlemarks.com/ try this site , good for beginners .
Looks like a food product of some sort, Salad dressing perhaps but something only semi-liquid due to the larger mouth opening. Maybe relish. sunrunner is right on with the age & collectability IMHO.