Antique Copper Tiffin Carrier

3-tier copper tiffin carrier (aka dabba), with brass handle and latches. Hand-etched designs. Not sure what inner material is - tin? aluminum? Cannot find any makers marks. Appears well-used - wear around latches and inside the compartments, quite a few nicks and scrapes throughout. Possibly a missing spice container (see images). Measures approx 6.75" in diameter and 8" from bottom to top of top compartment.