Killer7

Okay, Killer7 for GameCube wins. Handsomeman Executive Cola is the best fictional soda name ever.
The Video Game Soda Machine Project
Obsessively Cataloging Video Game "Pop" Culture

Okay, Killer7 for GameCube wins. Handsomeman Executive Cola is the best fictional soda name ever.
Serious Sam 2 brings us a Serious Drink for Serious Monsters! [Source]

Using crazy psychic powers in Beyond: Two Souls with a soda machine in the background.

The AssKickers, an imaginatively titled beat ’em up for PC, boasts destructible soda machines.

River City loves its soda machines, and so does River City Ransom!

Soder Cola, the DC Universe’s most popular carbonated beverage, appears in Batman: Arkham Origins!

These Vince D. Cola machines are named after Saturday Morning RPG’s composer, Vince DiCola. Thanks, @TheMightyRabbit!

If there are no objections, I think I’ll add this soda machine from Ace Attorney Investigations: Miles Edgeworth.

Red Bolt Energy Drink, courtesy of Tesla Effect: A Tex Murphy Adventure!

Life Is Strange. Soda machines, on the other hand, are quite normal. [Source]