A cluster pack comprises at least two containers connected by a glued joint. One of the containers has a thickened wall region in the region of the glued joint. This region acts as a well reinforcement to reduce the risk of tearing a container during detachment from the cluster pack.

A blow molded structure and having ribs formed therein, the ribs defined by a recess in one wall of the blow molded structure that defines two sidewalls on either side of a joint, the joint being a weld between the two opposing walls of the blow molded structure. The ribs are arranged in intersecting paths and a passage is defined in the interior cavity of the blow molded structure at the intersection of two ribs such that fluid flows through the passage during molding.

Multifluid dispensing system comprising a receptacle of container in container type and an atomizer Within the receptacle, between at least two of the component-units is provided a connecting-system that includes at least some of: at least one residual interface; at least one permanent-joint of adhesive or weld type; at least one reinforcing functional-form. The connecting-system preferably extends on the entire height of the receptacle. The parts of the connecting-system are preferably, at least partially, superimposed and contained within an operational-section. Additionally, within the receptacle is provided a partitioning-system that consists of at least one mobile-sector which develops via delamination from an internal component-unit. Within the receptacle is equally provided a compression-system that consists of at least one mobile-sector which also develops via delamination from an internal component-unit. The atomizer is made entirely of plastic, is of multifluid type, comprises a return-spring having two curved arms, and a precompression valve-system.

A plural preform assembly having nested preforms with an inner preform and an outer preform. The preforms are sealably joined together, defining a volume between the preforms. Propellant is disposed in the volume between the preforms. The preforms are later blow molded to provide a bag in bottle, bottle in bottle or similar container. The propellant charge is already present when blow molded, preventing the need for a later propellant filling step.

A preform configured to be blow-molded into a plastic bottle includes a neck section defining an opening, the neck section including a threaded portion configured to engage a closure, and a neck ring, a transition section having a first end positioned adjacent to the neck ring and a second end opposite the first end, a cylindrical body section extending from the second end of the transition section to a base, and a longitudinal axis extending from the opening through the base. The neck section, transition section, and the body section define a hollow channel positioned between the opening and the base. The transition section defines a tapered sidewall relative to the longitudinal axis, the tapered sidewall decreases a cross-sectional diameter of the hollow channel. The tapered sidewall of the transition section contains 20% to 30% of a total weight of the preform.

A plural preform assembly having nested preforms. The preforms are held together by an interference fit. The interference fit is provided by the friction between the preforms which occurs when the inner preform is inserted into the outer preform. At least one preform may have ribs extending radially towards the other preform. The ribs provided concentricity and interference to hold the preforms together during subsequent operations. The preforms may later be blow molded to provide a bag in bottle or similar container.

A plural preform assembly having nested preforms. The preforms are held together by an interference fit. The interference fit is provided by the friction between the preforms which occurs when the inner preform is inserted into the outer preform. At least one preform may have ribs extending radially towards the other preform. The ribs provided concentricity and interference to hold the preforms together during subsequent operations. The preforms may later be blow molded to provide a bag in bottle or similar container.

A plural preform assembly having nested preforms. The preforms are held together by an interference fit. The interference fit is provided by the friction between the preforms which occurs when the inner preform is inserted into the outer preform. At least one preform may have ribs extending radially towards the other preform. The ribs provided concentricity and interference to hold the preforms together during subsequent operations. The preforms may later be blow molded to provide a bag in bottle or similar container.

A cluster pack comprises at least two containers connected by a glued joint. One of the containers has a thickened wall region in the region of the glued joint. This region acts as a well reinforcement to reduce the risk of tearing a container during detachment from the cluster pack.

A plural preform assembly having nested preforms with an inner preform and an outer preform. The preforms are sealably joined together, defining a volume between the preforms. Propellant is disposed in the volume between the preforms. The preforms are later blow molded to provide a bag in bottle, bottle in bottle or similar container. The propellant charge is already present when blow molded, preventing the need for a later propellant filling step.