Honestly I think you guys are over complicating the reasons for the changes. It's most likely that they need the bottle to fit 20 ounces to match their other bottles. Then they need to make a bottle that can handle the pressures of a carbonated beverage which will likely dictate a specific shape.
I'm just glad they're doing this because one of the projects I had on the horizon for the next 18 months was to experiment with blow molding bottles. So they saved me the effort. Haha
-Nick
For whatever reason, they designed $50 bills and $5s. I think Doc says 'fifty' in the dialog, but $5 would fit the hypothetical inflation better:
Cost of soda:
1955 = $0.05
1985 = $0.50
2015 = $5.00
-MJ
The bottle is a limited edition collectible — Pepsi is planning on only making a run of 6,500 bottles — and will be sold only while supplies last. Those looking to purchase the bottle can do so for $20.15, not quite as pricey as the $50 that Christopher Lloyd's Doc Brown gave Marty in the film. The bottle will be sold online, though Pepsi recommends fans check out the company's social media pages closer to the Oct. 21 launch date to know exactly where they can purchase it.
Pepsi will also be distributing 1,500 Pepsi Perfect bottles ahead of its general release during New York Comic Con this week to fans dressed as Marty looking to "complete their outfit," Arbetter says.
It's the Nike Mag fiasco all over again.