Round-bottom flask stand

Round-bottom flask stand for 250 mL flasks

empty flasks wont be very stable if this object will be printed with standard filaments

Recommendation: Apply three small drops of hot glue onto the contact surface between glass and plastic and press the flask into the stand. Remove the flask afterwards. The flask should then be much more stable.

I also made multiple test tube stands, which can be found here:
Version for 7 small tubes: https://www.thingiverse.com/thing:2460058
Version for 7 normal sized tubes: https://www.thingiverse.com/thing:2719817
Version for 7 large tubes: https://www.thingiverse.com/thing:2460095
Version for a single large tube: https://www.thingiverse.com/thing:2460016