From the page: The Tetra Pak gives much more than it seems
Idea 8
Homemade measuring cup and funnel
Long-life cartons were born to preserve food through layers: paperboard for structure, polyethylene for sealing and aluminum against light and air. That same perfect sealing makes them reliable containers in the kitchen, and the square shape with a built-in cap becomes a funnel and measuring cup with almost no transformation.
What you need
- A clean, dry Tetra Pak carton (milk or juice box, preferably with a cap)
- Ruler
- Permanent marker
- Scissors or craft knife (with care, on a cutting mat)
- A real measuring cup or kitchen scale (just to check the markings once)
How to make it
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1
Wash the carton well inside with water and detergent and let it dry upright — any residue of sour milk spoils and contaminates whatever you measure later.
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2
With the ruler and pen, mark the height corresponding to each measure (for example, 250 ml and 500 ml) using a measuring cup or scale to check — the carton always has its total capacity printed on the packaging, which helps you verify.
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3
Make the marks on the side, facing forward, so you can read the measures without having to rotate the container.
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4
For the funnel, cut the carton in half on the diagonal or straight across and use the half with the spout — the neck comes ready-made, and the inner plastic channels liquid without soaking everything.
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5
For the measuring cup, keep the bottom intact and cut the mouth wider than the base, leaving the markings visible.
Finishing touches
Store the cup inside a dry cupboard and avoid hot liquids, which warp the inner plastic. If you want a narrow-spout funnel for sand, salt or grains, cut the spout slightly above the cap's thread — the cap closes it and turns it into a dispenser.
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