Threaded bottle neck and oil well: what they have in common

1. Step 1. Threaded bottle neck — is part of — Plastic bottle. A thread for the cap.
2. Step 2. Plastic bottle — is made of — PET. A PET bottle.
3. Step 3. PET — includes — Polyester. Polyester fibre is PET.
4. Step 4. Polyester — evolved from — Nylon. The next synthetic fibre.
5. Step 5. Nylon — is made of — Crude oil. The raw material is petrochemical.
6. Step 6. Crude oil — uses — Oil well. Oil is extracted from wells.

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