Question: How to cut open the top of a helium bottle?
Option 0: Find a helium bottle online then empty the bottle halfway. Cut open the tip and open the tube also from the side. The dimensions of the hole depend on your lateral opening on your stove.
Option 1: Find a helium bottle online then empty the bottle completely. Cut open the tip and open the tube also from the side. The dimensions of the hole depend on your lateral opening on your stove.
Answer: 1