Abstract: The invention relates to a cup made of foldable flat material with at least one desired fold line (22) along which a convex cup wall (24) can be pushed in to give a concave, dimensionally-stable form.
Abstract: The invention relates to a cup made of foldable flat material with at least one desired fold line (22) along which a convex cup wall (24) can be pushed in to give a concave, dimensionally-stable form.