I have looked and looked at these two bottles and I can't figure it out. I've never seen the coke bottle before, and I have the pepsi bottle but the neck on mine is much shorter. It also struck me how much they looked alike. http://www.ebay.com/itm/VINTAGE-PEPSI-COLA-SODA-BOTTLE-10-oz-EMBOSSED-/111435326857?pt=LH_DefaultDomain_0&hash=item19f2102589 http://www.ebay.com/itm/VINTAGE-COCA-COLA-COKE-SODA-BOTTLE-10-oz-EMBOSSED-/111435323092?pt=LH_DefaultDomain_0&hash=item19f21016d4 It seems like the more I study this hobby the less I know lol.Lisa