This record contains the supplementary materials (figures, photos and additional data) for the article “Rhyta and kernoi from the Domasław cemetery. The idea of offerings in the Hallstatt period”, Documenta Praehistorica 51 (2024), https://doi.org/10.4312/dp.51.9 Prepared within the research project: Feeding and Ritual Practices of the Early Iron Age based on the Settlement in Milejowice and the Necropolis in Domasław: Between the Function and Meaning of Ceramic ‘Collections’, financed by the National Science Centre, Poland (NCN).Grant no.: UMO-2021/41/B/HS3/02531 Principal Investigator: Anna Józefowska-Domańska About the article The paper analyses unique ritual vessels—rhyta, kernoi and pseudo-kernoi—from the Early Iron Age cemetery at Domasław (Poland) and situates them within Hallstatt funerary sets and Mediterranean-derived feasting/libation practices.Authors conducted GC-MS organic residue analyses on five ritual vessels, comparing them with ceramics from the Domasław cemetery (74 samples) and the nearby Milejowice settlement (46 samples). The chemical profiles (fatty acids, biomarkers) and multivariate statistics (PCA, clustering) distinguish rhyta/kernoi from other vessels, indicating fermented drinks, plant oils, animal fats, resins, and mixed ingredients consistent with libations during funeral rites.Contextual and functional discussion links these forms to pouring/mixing acts and ceremonial drinking; the finds underscore the adoption and local transformation of Mediterranean ritual ideas north of the Alps in the Hallstatt world.Overall, the study integrates morphology, context and biomolecular data to argue that these vessels served in offerings and libations associated with cremation ceremonies at Domasław.