A canister for connection to a carbonation machine comprising: a body with an interior to hold a pressurized or liquefied gas for enabling the carbonation machine to carbonate a liquid; a valve comprising: a canister port facing, and open to, an interior of a gas canister; at least two exterior ports that open laterally to a longitudinal axis of the valve for facilitating inflow of the gas into the gas canister and outflow of the gas out of the canister into an annular sealed gap forming a ring about a lateral surface of the valve, when the valve is connected to a connector for connecting the gas canister to a carbonation machine, from which the gas is directed to a carbonation head for carbonating a liquid in a bottle connected to the carbonation head, when the valve is in an open position, and to prevent the inflow or the outflow when the valve is in a closed position; a poppet that is slidable along the longitudinal axis, and wherein changing between the closed position and the open position comprises sliding the poppet along the longitudinal axis from the closed position to the open position; a resilient restoring structure configured to apply a restoring force to the poppet to maintain the poppet at the closed position; a plunger with an exterior surface that is exposed to the exterior of a body of the valve and configured, when an inward pushing force that overcomes the restoring force is applied to the plunger, to slide the poppet from the closed position to the open position; and a gasket configured to fluidically isolate the exterior surface of the plunger from being a path of fluidic flow between the at least one exterior port and the canister port. a body with an interior to hold a pressurized or liquefied gas for enabling the carbonation machine to carbonate a liquid; a valve comprising: a canister port facing, and open to, an interior of a gas canister; at least two exterior ports that open laterally to a longitudinal axis of the valve for facilitating inflow of the gas into the gas canister and outflow of the gas out of the canister into an annular sealed gap forming a ring about a lateral surface of the valve, when the valve is connected to a connector for connecting the gas canister to a carbonation machine, from which the gas is directed to a carbonation head for carbonating a liquid in a bottle connected to the carbonation head, when the valve is in an open position, and to prevent the inflow or the outflow when the valve is in a closed position; a poppet that is slidable along the longitudinal axis, and wherein changing between the closed position and the open position comprises sliding the poppet along the longitudinal axis from the closed position to the open position; a resilient restoring structure configured to apply a restoring force to the poppet to maintain the poppet at the closed position; a plunger with an exterior surface that is exposed to the exterior of a body of the valve and configured, when an inward pushing force that overcomes the restoring force is applied to the plunger, to slide the poppet from the closed position to the open position; and a gasket configured to fluidically isolate the exterior surface of the plunger from being a path of fluidic flow between the at least one exterior port and the canister port. a canister port facing, and open to, an interior of a gas canister; at least two exterior ports that open laterally to a longitudinal axis of the valve for facilitating inflow of the gas into the gas canister and outflow of the gas out of the canister into an annular sealed gap forming a ring about a lateral surface of the valve, when the valve is connected to a connector for connecting the gas canister to a carbonation machine, from which the gas is directed to a carbonation head for carbonating a liquid in a bottle connected to the carbonation head, when the valve is in an open position, and to prevent the inflow or the outflow when the valve is in a closed position; a poppet that is slidable along the longitudinal axis, and wherein changing between the closed position and the open position comprises sliding the poppet along the longitudinal axis from the closed position to the open position; a resilient restoring structure configured to apply a restoring force to the poppet to maintain the poppet at the closed position; a plunger with an exterior surface that is exposed to the exterior of a body of the valve and configured, when an inward pushing force that overcomes the restoring force is applied to the plunger, to slide the poppet from the closed position to the open position; and a gasket configured to fluidically isolate the exterior surface of the plunger from being a path of fluidic flow between the at least one exterior port and the canister port.