The invention relates to a fluid delivery assembly for a spray gun, the assembly comprising a container for holding paint. The container is self-supporting and configured to collapse as fluid is dispensed via the spray gun, wherein the container comprises at least one vent. The invention further relates to a spray gun including such fluid delivery assembly, a method of forming the container and a thermo/vacuum forming tool to be used in such method.

The present specification relates generally to spraying devices and more specifically to a spring-loaded portable spraying device for dispersing liquids without electricity or gas propellants and a related method. The spring-loaded spraying device comprises at least one canister assembly, wherein each canister assembly comprises a canister; a rod partially contained within the canister; at least one spring, wherein the at least one spring is coiled around the rod; and a spring-locking mechanism; a canister recipient, for receiving the at least one canister assembly; at least one fluid channel in communication with the at least one canister and extending through the canister recipient; a valve within the at least one fluid channel; a trigger assembly functionally connected with the valve; and a handle connected to the canister recipient.