Bottomless mimosas consist of equal parts champagne or sparkling wine and freshly squeezed orange juice. The bubbly champagne complements the sweet tanginess of the orange juice, creating a refreshing and delightful drink. “Bottomless mimosas” refer to the concept of an unlimited mimosa with refills during a fixed period at brunch events, offering a relaxed and enjoyable dining experience at restaurants or bars. However, variations with other fruit juices or liqueurs are sometimes available.