Are you looking for pinecone for bathroom!

A simple pinecone from your backyard can act as a natural humidity detector — and science fully backs this up. Pinecones are built to protect and spread seeds. Their scales are made of two layers of plant tissue that react differently to water. When moisture or steam hits them — like during a hot shower — the outer layer absorbs water and swells, forcing the scales to close shut. When the air dries out again, the outer layer shrinks back, and the scales open up again. No batteries. No technology. Just nature. This is not a trick — it is a real biological process called hygroscopic movement. In the wild, pinecones use this same mechanism to time seed release perfectly. They open on warm, dry days so the wind can carry their seeds far and wide. They close on wet days so rain does not wash the seeds straight to the ground. Scientists at the Royal Botanic Gardens, Kew confirm that pinecone scales are one of nature's most elegant examples of passive movement in plants, responding purely to humidity changes. BBC Science Focus and Scientific American have both highlighted pinecones as natural hygrometers — devices that measure humidity.