Float (liquid level)
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Liquid level floats, also known as float balls, are spherical, cylindrical, oblong or similarly shaped objects, made from either rigid or flexible material, that are buoyant in water and other liquids
A float ball (in orange color)
Polypropylene
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Polypropylene, also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene.
Effect of UV exposure on polypropylene rope
Polypropylene lid of a Tic Tac box, with a living hinge and the resin identification code under its flap
A chair with a polypropylene seat
Polypropylene items for laboratory use. Blue and orange closures are not made of polypropylene.