Carlitos y Patricia, the Barcelona boutique behind last year's Muji Noel vending machine, is back with another whimsical promotion for the Japanese retailer in Spain, Muji Ojokeesu, a customization kit to turn your Muji suitcases into "The Perfect Travel Companion."

The campaign, Carlitos Y Patricia's third for Muji Travel, included 20,000 sticker flyers in four different "characters": Minako, Takeshi, Kokoro y Aiko, which recipients could then use to bring personality to their travel pieces. The agency also sent out newsletters inviting customers into the Muji store to win a trip to Muji's MOMA story in New York. Also part of the effort was a facebook contest and an in-store event during which Japanese artist Yoshi Sislay customized Muji suitcases live with his own artwork.