Per 
SCP-4937 (Dr. Wondertainment piggy bank) Object class-safe
Put in money, the next day it starts multiplying
Works with currency ranging from pennies to 20 dollar bills (US currency)
Shown on original box that it has different versions in 5 other countries, each made for different forms of currency
Internal scans of SCP-4937 have shown no anomalous effects, and only the original piece of currency shows up on the internal scan
SCP-4937 has no hole in the bottom of the bank, only way to get money inside is to break bank
Hole visibly disappears (almost immediately) once money is put inside
Two bills cannot be inserted into SCP-4937 at once, or else the bank won’t work
Made out of ceramic, no anomalous materials used
If a 20 dollar bill is placed inside SCP-4937, the next day there will be 2 twenty dollar bills, the same goes for any other form of currency. They seem to multiply in the same way cells do, where the first bill multiplies into two, on the second day the two inside then multiply into four, on the third day the four multiply into eight, and so on
