4.A pop-up trundle bed because why choose between a twin or king when you can have both? This daybed extends from a twin to a king-size with a simple pull, making it perfect for guests or anyone ...

Three-in-One Bunk Bed: Merax Trundle Bunk Bed, $291 Kid-Friendly Frame: Pottery Barn Kids Ava Regency Trundle, $499 For the Grown-Ups: DHP Locky Daybed with Pop Up Trundle Bed, $350 ...