Flaming-Os

Flaming-Os is a snack food brand that is present in GTA 6.

Several bags of Flaming-Os can be seen on the shelves of Uncle Jack's Liquor. They are shown to have blue packaging, decorated with a pink flamingo mascot.

As its name would suggest, the snack appears to be O-shaped, which likely means that they are onion rings.

In addition, it's likely that the snack is spicy, given that its name starts with the word 'Flaming.'