Paperboard layer and dewar flask: what they have in common

1. Step 1. Paperboard layer — is part of — Tetra Pak. Stiffness.
2. Step 2. Tetra Pak — is made of — Polyethylene. Polyethylene.
3. Step 3. Polyethylene — is made of — Crude oil. Made from petroleum products.
4. Step 4. Crude oil — is used in — Tanker. It carries oil.
5. Step 5. Tanker — includes — LNG carrier. A tanker.
6. Step 6. LNG carrier — has part — Dewar flask. Insulated tanks.

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