Cap liner and diesel engine: what they have in common

1. Step 1. Cap liner — is part of — Crown cap. A seal inside the cap.
2. Step 2. Crown cap — is part of — Glass bottle. A cap.
3. Step 3. Glass bottle — includes — Soda siphon. A soda siphon is a strong bottle charged with carbon dioxide.
4. Step 4. Soda siphon — has part — Valve. A valve.
5. Step 5. Valve — is part of — Internal combustion engine. Valves let in the mixture and let out the gases.
6. Step 6. Internal combustion engine — includes — Diesel engine. A diesel is a kind of internal combustion engine.

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