| http://www.w3.org/ns/prov#value | - With reference to FIG. 20, the closure 330 can include an inner portion 332 comprising a lubricious or low friction material (e.g., an olefin or other material having a low coefficient of friction) and an outer portion 334 comprising a polymer, such as an olefin polymer, foam material, PET, and other materials described herein.
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