Handle and micrometer: what they have in common

1. Step 1. Handle — is part of — Kettle. A heat-insulated handle.
2. Step 2. Kettle — has part — Pot lid. A cap.
3. Step 3. Pot lid — is part of — Saucepan. A cap.
4. Step 4. Saucepan — is made of — Stainless steel. Stainless steel.
5. Step 5. Stainless steel — is material for — Vernier caliper. Stainless steel.
6. Step 6. Vernier caliper — evolved into — Micrometer. A more precise instrument.

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