Piggy bank is a great way to accumulate such necessary currency in the game — diamonds! Let's have a look at the main points:

• Piggy bank size S capacity — 200 diamonds. The maximum size of Piggy bank is XXL.
• Piggy bank grows when you spend diamonds, upgrade, and optimize your machines. One diamond spent diamonds give you +10 diamonds. Each major machine upgrades & evolves give you +10 diamonds.
• VIP club members have Piggy bank with a larger capacity.
• The purchase button becomes available only after the offer is fully filled.
• It requires at least 200 diamonds inside to break the piggy bank.
• When you start filling the Piggy Bank, the timer appears. It will last 72 hours from the moment it starts. If you don't open the Piggy Bank during this period, the progress will be lost.
• The full Piggy bank (if it is not opened) will be reset after 120 hours.
• You don't get diamonds automatically when the scale is full. You will still need to break it for money.