Listings commonly cite silicone, polyester, plastic, and PVC as the primary materials used for clips, straps, charms, and holders.
Common attachment methods include elastic or plastic rings and stretch handles for straps; detachable shoulder straps or small clasps for charms; and stick-on hooks for adhering charms or hangers to bottles.
They’re described for outdoor and everyday use—walking, cycling, hiking, camping—and for hands‑free carrying on backpacks or bicycles.
Many listings describe them as compact, pocketable, or foldable—able to fold into the palm or fit into a pocket or handbag for easy storage.
Pack counts shown range from single‑piece items up to six‑piece sets.
