How embarrassing. I asked the question that prompted the linked answer and I still haven’t done anything with the tuna cans I’ve got saved up.
Knead
Lazy M.F. from way back.
Silly boy! You cut the bottom off with your Ginsu knife right after you’ve sliced off the toe of your boot. 
(takes notes) Personally, I wanna take the bottom off a SPAM can without taking the top off, as the can is destined to be a flatcar load for one of my Lionel trains, and I’d just as soon the can be empty and washed…
No help for you, Major Matt Mason.
But in the more-than-seven years since I started this thread, I’ve made musubi (the first time with the bottom cut off of a SPAM[sup]®[/sup] can – and I didn’t slice my fingers), and have bought an acrylic musubi press.
Yum.
And I’ll just mention that in my family, the standard tool for cutting dough for making pierogis is an empty tuna can. Mom keeps one in her utensil drawer just for that purpose.
For biscuits, I use a class.
Typing 101, I assume? 
:smack:
‘Glass’.
When we went camping we used corned beef which comes in similar cans. I wanted to flatten them for recycling and found it easy to take the bottom off with a wingnut type can opener.