Everyone knows that the only way to eat a baguette is while wearing a striped shirt and a black beret after taking it home from the boulangerie on your bicycle.
Slice it before you go. Are items with bread not found in picnics?
Sandwiches are perfect for a picnic, and it's an occasion you'd want to gussy them up a bit for. Fancier bread might be the cheapest and most obvious way to do that.
It's something that has existed for decades, possibly close to a century now? It typically includes two small plates, two white mouth wine glasses, two spoons, forks and knives, space for a wine bottle with a way to keep it chilled, food and usually some space for napkins and such.
Just checked and Amazon does indeed sell them, some are pretty fancy haha.