This is a stand for 1-L Imhoff cones. It consists of three parts, a base plate, a lower stand and an upper stand which can be press-fitted together but for easy-of mind should be epoxy-glued together. The cone has four slots on each the mid and upper levels for optional attachments (one for 25-mm glass tubes is included in the files).

All parts were printed in PETG with 0.2 mm layer height, three perimeters and 25% infill. No supports needed. Lower and upper stands need to be printed upside-down. The glass-tube attachment can be printed upright with 0.3-mm layer height and added supports.