I've watched a Youtube about how to start my seeds for my hydrophonic tower I've printed, and noticed a lot of people using ice cubes tray and some plastic box, 

Giving I don't want to ruin a plastic box and don't have an ice cube tray, I've decided to create one.

Print the bottom file with at least 5 walls loops to prevent water leakage.

No support

PLA

I've used 0.6 nozzle for speed, but 0.4 is just fine.