A fluid container includes a support body having a reservoir for accommodating fluid, and a nozzle body attached to the support body. The support body has a lid for closing the reservoir. The nozzle body includes: a formation unit for forming an opening through the lid; a pipe communicating with the opening for permitting passage of the fluid; and a discharge port communicating with the pipe for discharging the fluid. In a first state, the formation unit and the lid are separated as the nozzle body and the support body are engaged. In a second state, the opening of the lid is formed as the nozzle body moves in a direction to approach the support body from the first state. In a third state, at least a part of the formation unit and the lid are separated as the nozzle body moves in an opposite direction from the second state.

A method of sealing a bottle includes providing a bottle having a bottle body, a neck, a bottle opening, and a bottle main cavity. The neck has a neck inner radial surface and an opposing neck outer radial surface. The neck has a neck annular top surface. The bottle is formed of a thermoplastic material. The method includes providing a seal insert having a cylindrical skirt, a circular flange, a pull-tab, and a sealing deck. The cylindrical skirt has an insert inner radial surface and an insert outer radial surface. The circular flange has a flange outer edge, a flange annular top surface and a flange annular bottom surface. The seal insert is formed of a thermoplastic material. The method includes molecular bonding the flange annular bottom surface directly to the neck annular top surface. The method includes providing a closure and attaching the closure to the bottle.

A package includes a container and a closure coupled to the container to control release of product therefrom. The closure includes a closure cap coupled to the container and a flip-top cap coupled to the closure cap and configured to pivot relative to the closure cap between a closed position and an opened position.

Disclosed is an opening system for a container that is closed with a lid, which is located under pressure. The system includes a) an arrangement suitable to allow the opening of said lid of said container; b) a flexible element suitable to be connected to said container, and suitable to be inflated; and c) a pressure-regulating subsystem suitable to produce an increase of pressure inside said container up to a value that causes the inflation of said flexible element and its tearing.