Upside-down holder/tray for 100 ml serum vials

One of the experiments involved growing anaerobic microorganisms in upside-down 100ml serum vials within a thermostat without shaking. These holders were designed with that in mind, and they fit WHEATON Serum Bottle 100 mL with crimp neck (actual full volume is 117 ml).

For lower temperatures, use PETG (up to 65 °C), and for higher temperatures (around 80 °C), use PC. Carbon-filled materials might also be OK at 80 °C, but we haven't tested that yet.

These holders were designed in Solidworks 2021 as part of work at Wageningen University and Research.