Embodiments of the present disclosure are directed to a vessel comprising a wall at least partially made of a compostable or biodegradable material, having an interior surface enclosing a lumen and an exterior surface; and a PECVD coating set on the interior surface, the exterior surface, or both. The PECVD coating set comprises a barrier coating or layer of SiOx, in which x is from about 1.5 to about 2.9 as measured by XPS. The PECVD coating set optionally further comprises a tie coating or layer comprising SiOxCy, in which x is from about 0.5 to about 2.4 and y is from about 0.6 to about 3 as measured by X-ray photoelectron spectroscopy (XPS); a pH protective coating or layer comprising SiOxCy, in which x is from about 0.5 to about 2.4 and y is from about 0.6 to about 3 as measured by XPS; or both. The vessel may also include a lacquer coating between the surface of the wall and the PECVD coating set. In some embodiments, the vessel may be a single use coffee or tea pod.

Example embodiments relate to methods and systems for generating and using abrasive articles. An abrasive article includes an open cell foam body and an abrasive composition disposed homogenously throughout the open cell foam body. The abrasive composition includes a resin and a plurality of abrasive particles, where each abrasive particle has a threshold hardness (e.g., a hardness of at least 6 on a Mohs scale). As such, the abrasive article has an effective grit that depends on a pressure applied to the article and can have a variable grit that depends on the properties of the open cell foam body and abrasive particles