If using falcon tubes instead of a puck system:
- Drill a hole in either the cap or side of the tube to allow LN2 to pour in and N2 to vent out. LN2 will expand 696 times as it vaporizes, which can cause a falcon tube to crack or explode ③ when unable to vent out.
- Securely fasten the cap of the tube. If it comes off during shipping the grid boxes can get knocked around the dewar ④.