A method for transporting melt in a melt transport device, comprising the method steps: - providing the melt transport device comprising a melt container in which a melt receiving space is formed and a spout which is coupled to the melt container, wherein the spout has a spout orifice which is flow-connected to the melt receiving space, wherein a gas valve is formed which is flow-connected to the melt receiving space, and which is formed for controlling the gas entry into the melt receiving space, and wherein a) a siphon is formed in the spout, which siphon has a reservoir arranged between the melt receiving space and the spout orifice, wherein the reservoir has an overflow level, wherein a siphon wall is formed having a siphon wall lower edge, wherein the siphon wall projects into the reservoir such that a siphon wall lower edge is located at a lower level than the overflow level of the reservoir, and/or b) a sieve is arranged in the spout, which sieve has a mesh width between 0.05 mm and 10 mm; - filling the melt receiving space of the melt transport device, wherein the gas valve is open during the filling of the melt receiving space; - terminating the filling operation and closing the gas valve when an actual fill quantity level in the melt receiving space is equal to a target fill quantity level; - transporting the melt transport device from a filling position to a casting position, wherein a negative pressure is present in the melt receiving space during the transport of the melt transport device, wherein a leakage of the melt from the spout orifice is prevented by the negative pressure in cooperation with the ambient pressure, characterized in that when the melt receiving space of the melt transport device is filled, first a melt of a first composition is received and subsequently a melt of a second composition is received, wherein the melt of the second composition has different physical or chemical properties to the melt of the first composition. - providing the melt transport device comprising a melt container in which a melt receiving space is formed and a spout which is coupled to the melt container, wherein the spout has a spout orifice which is flow-connected to the melt receiving space, wherein a gas valve is formed which is flow-connected to the melt receiving space, and which is formed for controlling the gas entry into the melt receiving space, and wherein a) a siphon is formed in the spout, which siphon has a reservoir arranged between the melt receiving space and the spout orifice, wherein the reservoir has an overflow level, wherein a siphon wall is formed having a siphon wall lower edge, wherein the siphon wall projects into the reservoir such that a siphon wall lower edge is located at a lower level than the overflow level of the reservoir, and/or b) a sieve is arranged in the spout, which sieve has a mesh width between 0.05 mm and 10 mm; a) a siphon is formed in the spout, which siphon has a reservoir arranged between the melt receiving space and the spout orifice, wherein the reservoir has an overflow level, wherein a siphon wall is formed having a siphon wall lower edge, wherein the siphon wall projects into the reservoir such that a siphon wall lower edge is located at a lower level than the overflow level of the reservoir, and/or b) a sieve is arranged in the spout, which sieve has a mesh width between 0.05 mm and 10 mm; - filling the melt receiving space of the melt transport device, wherein the gas valve is open during the filling of the melt receiving space; - terminating the filling operation and closing the gas valve when an actual fill quantity level in the melt receiving space is equal to a target fill quantity level; - transporting the melt transport device from a filling position to a casting position, wherein a negative pressure is present in the melt receiving space during the transport of the melt transport device, wherein a leakage of the melt from the spout orifice is prevented by the negative pressure in cooperation with the ambient pressure,