Replaceable cartridge with capillary

A replaceable cartridge configured for being detachably connectable to an aerosol-generating device, the replaceable cartridge comprising:

• a liquid storage portion configured to store a liquid agent, the liquid storage portion comprising a liquid outlet configured to direct the liquid agent out of the liquid storage portion;
• and
• a capillary being in fluid communication with the liquid storage portion and the liquid outlet, the capillary having a cross-section and a longitudinal length,
• wherein a surface of the cross-section of the capillary remains constant along at least a part of the longitudinal length of the capillary,
• wherein the liquid storage portion further comprises a first wall with a first inner surface and a second wall with a second inner surface,
• wherein the capillary is formed between an opposing first inner surface and second inner surface,
• wherein the liquid storage portion further comprises an outer shell as the first wall and an inner shell as the second wall, the inner shell being housed in the outer shell of the liquid storage portion,
• wherein the capillary is located between the inner shell and the outer shell, and
• wherein the liquid agent comprises at least one aerosol-former selected from a group consisting of:
• polyhydric alcohols, esters of polyhydric alcohols, and aliphatic esters of mono-, di-, or polycarboxylic acids.