Abstract: A receptacle has at least one elastomeric sidewall with a contoured non-linear shape defining a container with a predetermined volume for housing a substance to be contained. The at least one sidewall includes a substance-contacting surface. The receptacle is fully reversibly eversible to transform between a first stable conformation with the substance-contacting surface facing inward and a second stable conformation with the substance-contacting surface facing outward allowing for facile cleaning and drying of the substance-contacting surface. The at least one elastomeric sidewall possesses sufficient structural strength to stand upright in the first and second stable conformations without extraneous support. The receptacle can include a cap and an attachment joint for securing the cap to the elastomeric receptacle.

Abstract: A receptacle has at least one elastomeric sidewall with a contoured non-linear shape defining a container with a predetermined volume for housing a substance to be contained. The at least one sidewall includes a substance-contacting surface. The receptacle is fully reversibly eversible to transform between a first stable conformation with the substance-contacting surface facing inward and a second stable conformation with the substance-contacting surface facing outward allowing for facile cleaning and drying of the substance-contacting surface. The at least one elastomeric sidewall possesses sufficient structural strength to stand upright in the first and second stable conformations without extraneous support. The receptacle can include a cap and an attachment joint for securing the cap to the elastomeric receptacle.

Abstract: An elastomeric containment receptacle has at least one sidewall defining a container substantially surrounding and enclosing a predetermined volume for housing a substance to be contained within the receptacle. The at least one sidewall includes a substance-contacting surface. The receptacle is reversibly transformable between a first stable conformation, wherein the substance-contacting surface faces inward, and a second stable conformation, wherein the substance-contacting surface faces outward. In other words, the receptacle is fully eversible, allowing for facile cleaning and drying of the receptacle interior. The receptacle possesses sufficient structural strength to stand without extraneous support. The eversible receptacle can be adapted to serve as a nursing bottle or other beverage receptacle. The receptacle can include a nipple or other receptacle cap, and an attachment joint for securing the cap to the elastomeric receptacle.