Some snacks are inherently childish and feature branding that says as much. Say you saw an adult sipping out of a tiny straw poked into a Capri-Sun? Well, you might consider that an infantile beverage choice.
On the other hand, Pepperidge Farm’s Goldfish crackers exist at the intersection of age-agnostic snacking while also still strongly being associated with children. I know Goldfish are popular with kids, but plenty of my adult friends like munching on these cheesy crackers, sometimes with wine or beer.
OK, a lot of times with beer or wine.