There are several previous studies on single use plastic bags and their alternatives for shopping. The need for a study for Norwegian conditions arose as the bags used in Norway were perceived by industry as of high quality and multifunctional (used as bin liners by Norwegian consumers). The seemingly poor performance of multiuse alternatives in other Scandinavian studies motivated NORSUS to want to perform such a study. Thus, the actors involved had different preconceptions, but a common interest in performing a robust study. This study will be made public and used to inform Norwegian consumers, thus a critical panel has been involved during the whole study.