15-ml and 50-ml tube holders (tip box inserts)

thingiverse

These are inserts suitable for empty 1.25-ml tip boxes (Biozyme). Once the sterile tip box is emptied it can be used as a pretty stable 15- or 50-ml tube holder. There are 2 types of files: - flat (1.2 mm tall), - with tube extension (for better tube support). I print them with 0.2 mm layer height. No bottom or top layers, just honeycomb infill 20-30%, 2-3 perimeters do well.