貯金箱

1. Origins, structure, and basic meaning

• Structure: 貯金箱 (ちょきんばこ) is a coin bank, often a piggy bank when shaped like a pig.
• Basic usage: 貯金箱に硬貨を入れる makes it a container; 貯金箱を棚に飾る makes the pig-shaped bank a display object.

2. Common pitfalls and similar expressions

• Savings container and displayed object
  • に marks the coin's destination, while を marks the bank being displayed; piggy bank is especially apt for the shaped example.