Provided are a container with improved recycling properties, and a pre-molded body of the container. The present invention provides a container comprising a support, a protective layer provided on at least one surface side of the support, and a barrier layer provided between the support and the protective layer, The organic light emitting device according to claim 1, wherein the support comprises a thermoplastic resin, the barrier layer is water-soluble or alkali-soluble, A container comprising a polymer component comprising an olefin-based monomer and an acrylic monomer. Figure 1
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