Where would she even buy them? It's not like Gensokyou has that kind of technology. Maybe she scavenged them from the edge of the border? (But then, she could probably sell them for more than the cans...)
Let's clean up the village!
Paying for empty cans!
50 yen a bag!
I am Yorigami Shion.
Today I came across some great news!
...Wah! I was late!
There isn't a single can left in the whole village!
*SPARKLE*
*SPARKLE*
*SPARKLE*
I have no choice...
I'll make my own fake cans, and bring those in...!