POP MART Labubu the Monsters SpongeBob Series is a sealed case of 12 blind boxes. The series joins POP MART characters with the licensed world named in the title, while underwater settings accompany the familiar shapes of a sponge, starfish and other friends; the unopened group package holds 12 separate blind boxes, while the multi-item carton keeps 12 boxes together and remains complete until unsealed. Inside is a small solid character carrying the visual signs of its line, while a particular character cannot be selected before opening, and a secret design may replace a regular variant. Ocean characters unify the carton.