Tea bag string with tag and boiler: what they have in common

1. Step 1. Tea bag string with tag — is part of — Tea bag. For taking out the bag.
2. Step 2. Tea bag — is made of — Paper. Filter paper.
3. Step 3. Paper — is used in — Rotary printing press. It prints on a paper web.
4. Step 4. Rotary printing press — has part — Watt steam engine. The first rotary presses were steam-driven.
5. Step 5. Watt steam engine — has part — Boiler. The boiler supplies steam.

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