No, I've seen these on the back of aluminum panniers. There is a small shelf bracket and the can sits on it and the can is strapped to it with a velcro strap.
If you can read this, thank a TEACHER. If you're reading this in ENGLISH, thank a SOLDIER.
God Bless us all.
88 NX 125, 99 Valkyrie, 02 KLR
Pulling my homebuilt monowheel