Bottle Cap Liners
Description: A cap liner (or cap gasket) is usually made of plastic and is used to form a seal between a metal bottle cap and a glass-bottled beverage or between a metal jar lid and a glass food jar.
Potential Concern: Chemicals of concern present in the liner may migrate into beverage or food products or leave a chemical residue on the glass rim, exposing consumers. When discarded, the same chemicals may pollute the environment or create toxic combustion byproducts if the metal is recycled.
Solution Focus: Choose cap liners that avoid chemical additives of concern. Also avoid plastics that pose toxic hazards over the lifecycle of the product.
References
Defend Our Health and Ecology Center (2021) Capped with toxics: Toxic chemicals found in the plastic liners of bottle caps from glass-bottle beverages. Full report.
Carlos KS, de Jager LS, Begley TH (2018). Investigation of the primary plasticizers present in polyvinyl chloride (PVC) products currently authorised as food contact materials. Food Additives and Contaminants: Part A. 35:6, 1214-1222. https://doi.org/10.1080/19440049.2018.1447695
See full list of resources here.
Information last updated: 10/28/2021
