Summary

Inspired by my need for dividers inside my doorstep delivery cool box, I whipped up this design on Tinkercad with slots every cm, alternating sides to preserve the strength. It's thin, at 2mm deep, the slots are 3mm and the whole is 50mm high by 240mm long. Four of them fit neatly on my Creality Hi plate and take 3 hours to print on basic settings with PLA.