Abstract: A process for producing a canned product comprises the steps of: providing a can (1), a lid (2) and contents to be filled in the can (1), the can (1) having a mouth (13), and the lid (2) having an extension (21) that is able to fit the mouth (13) to seal the can (1); filling the can (1) with the contents; fitting the lid (2) in the mouth (13) of the can (1), such that the extension (21) of the lid (2) forms a fit with a sidewall (11) of the mouth (13). The process further comprises the step of forming at least one bulge (22) on one of the extension (21) of the lid (2) and the sidewall (11) of the mouth (13) after fitting the lid (2) in the mouth (13) of the can (1), wherein while the lid (2) is removed from the can (1), the convex surface of the at least one bulge (22) is engaged with the other of the extension (21) of the lid (2) and the sidewall (11) of the mouth (13) in such a way that the extension (21) and/or the sidewall (11) is destroyed. A canned product produced by the process is also disclosed.