Figure 1: Overcurved rings are found in daily life.
From: Overcurvature describes the buckling and folding of rings from curved origami to foldable tents
(a) Foldable ‘2-second’ tent. (b) Foldable football goal. (c) Foldable laundry basket. (d) Author-made curved origami based on a circular crease pattern proposed by Demaine et al.7
