Easy One?

[Gondring]

Total newbie.
10 oz Sprite bottle that says
Sprite 10 FL OZ on one side, and
Sprite TRADE-MARK(R) A PRODUCT OF THE COCA-COLA COMPANY on the other.

Bottom says "SARATOGA NATL. HIST. PARK"

In center of bottom is a capital G and then the mark under it. An I in an O? Is that Illinois Glass?

Trying to figure it out without bugging everyone, but need help.

 

[Gondring]

Here's the bottom...

Thanks!

 

[Gondring]

Now I see a thread on a similar bottle at
https://www.antique-bottles.net/forum/%244%2C000_sprite_bottle_lol/m_27843/tm.htm