Porcelain and zip: what they have in common

1. Step 1. Porcelain — is material for — Dentures. Porcelain teeth.
2. Step 2. Dentures — is made of — Bone. With teeth made of bone or real teeth.
3. Step 3. Bone — is material for — Button. Ancient buttons were carved from bone and shell.
4. Step 4. Button — works like — Zip. An alternative way of fastening.

Open Evothings