a hollow plastic body comprises a material composite consisting of a stamp - formed panel or sheet - like first layer of a first thermoplastic synthetic material , an optionally stamp - formed panel or sheet - like second layer of a second synthetic material , and an open - cell or mixed - cell foam layer of a third synthetic material disposed between the first and the second layer . the foam layer may be compressed at least in some sections in accordance with the stamped form of the first layer and / or the second layer . the foam layer may be in mechanical contact with the first or / and second layer substantially only in the compressed sections . advantageous manufacturing methods for hollow plastic bodies are further disclosed .