The Holiday Gift Bundle
An apparel store builds a "Holiday Crew Bundle", one mug, one tee, one sticker pack, one enamel pin. Each item has its own individual listing. The bundle gets its own product page at a price that undercuts buying them separately by a small amount. When someone orders the bundle, the cart shows all four items. The order confirmation lists all four. The fulfillment team sees all four explicitly labeled in the admin. Four slots pulled from the right bins. Mug stock and tee stock both decrement. Nobody guesses. The store runs a Black Friday flash sale on the bundle. It sells out. The moment the last mug sells, the bundle goes out of stock automatically.