From the page: A thousand colors in a few grams
Idea 6
Pinning-hole watering can
Homemade watering cans with fine holes have existed since backyard gardens became routine in cities — grandmothers and urban gardeners have always improvised with cans and bottles. The physics is simple: small holes break the stream of water into gentle drops, mimicking rain, without washing away the soil or burying freshly planted seeds.
What you need
- Plastic caps (10 to 20, from soda bottles or jugs)
- A thin nail and hammer (or a punch / heated screw, with care)
- A 2-liter plastic bottle with its cap
- Strong plastic glue (like contact cement or silicone adhesive)
- A wooden board to support while piercing
How to make it
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1
Wash the caps and the bottle well, because any grease prevents the glue from sticking. Let them dry upside down.
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2
Pierce each cap in the center with the nail against the board: a thin hole makes delicate drops for seedlings, and you can vary the size depending on what you'll water. Always pierce from the inside out so the plastic doesn't crack.
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3
Glue the caps to the side of the bottle in staggered rows (like little bricks), holding each one with pressure for a few seconds. The staggered layout distributes the water more evenly.
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4
Let the glue cure for the time indicated on the package, usually a few hours, so no cap comes loose mid-watering.
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5
Fill the bottle, cap it and tilt it slowly over the plants: the water flows through the caps in a fan shape, like a little shower.
Finishing touches
Make two versions — one with very fine holes for seed trays and another more open for large pots. If you like, paint the bottle with plastic paint and turn the watering can into a decorative piece for the garden.
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