Lumos - Spare Ink Reservoirs

I'm using the Lumos and looking for additional parts. It works great.

I looove watching the white reservoir change color as it fills up with ink. Super cool.

I've washed them out to change colors about three times now for the provided refills, and these spares are great to put into the pen while the existing ones are drying. The official site says a maximum of 4-5 washes if changing inks - no limit if refilling with same ink!