Not meaning to hijack, just offer other alternatives,
I have also made them using this type of deodorant can and they work a treat.
any ali can with a reduced neck works, I also found if you make the jet holes with a notice board pin or similar, make them and tilt at an angle, aiming toward the next jet hole, I found it helped ignite and bloom much faster.
Note:
I appreciate people dont like to open cans of this type, I make sure they are empty shake and keep depressed until no sound is heard. Then remove plastic top they pull off, but are difficult at times.
then peel the rim with pliers this opens the can making the rubber seal fail, proving no pressure in the can. leave this rim intact, once the can is cut in the place required, this rim fits over the dome base and makes a perfect start for the inner wall if you file groves into it.
I WOULD NOT recommend you have scouts do this in case any decide to try at home alone.