The shell is the part you see.
Its outline, colour and surface can change while the liner inside stays familiar. A plant can move from a plain shell to ribs, quilting or a different colour without having its roots pulled apart.
The liner is where the plant lives.
It carries the medium and lifts out as one piece. Liners follow a shared size ladder, so another shell at the same size can take the same planted liner.
The mesh supports the medium.
The open floor lets water and air pass while holding the mix above the reservoir. It is its own piece, so it can be cleaned or replaced without replacing the liner.
The feet set the water space.
They plug into the liner and hold it above the reservoir. A different height changes the space below while leaving the planted chamber alone.
The seat ring makes different outsides possible.
A round liner can sit securely inside a round, square or faceted shell because the ring bridges the two. It also gives the liner a place to lift from and leaves an opening for filling the reservoir.
The ring is the quiet part of the system, but it is the reason changing the outside does not mean changing the plant.
The outside can stack, too.
These pots divide the shell into keyed rings. Each ring is printed separately, then locates into the one below it, so colour, height and the lower tray can be handled as real pieces rather than painted bands.
Ring
Three fluted rings that key together into one shell.
See Ring
Gild
Four rings above a separate tray that screws off.
See Gild
Tricolour
Three separate colours, stacked in the order of the Armenian flag.
See TricolourMix the visible part. Keep the part that is working.
A new shell can change the colour or the shape of the pot. A spare liner can hold a division. Feet and mesh can be replaced on their own. The design is modular so a change has a small answer instead of becoming a reason to throw the whole object away.