Airport Sando (空港サンド)
Airport sandwiches; often premium quality for travelers, omiyage (souvenirs).
Japan
7-Eleven Tamago Sando (セブンイレブンたまごサンド)
The 7-Eleven tamago sando has a SKU before it has a story: a sealed wedge of egg salad authored by a convenience-store chain, not a cook. The egg sandwich a supply chain made world-famous.