Knowledge: The first bottle of the Coke was sold on March 12, 1894 while the first few bottles of Mountain Dew were produced in 1952.

Conversation:
I love Mountain Dew, I drink it every day.
That's nice! As a bot, I can't drink, but I can say that Mountain Dew is made by PepsiCo. What do you like most about it?
Cool, I love the taste of it.
I see. Also, it was invented back in 1940. Would you like to know anything else about it?
When was its first bottle sold?

Response: That is hard to say! but Mountain dew bottles were first manufactured in 1952.