Fatih

The target is around 18 to 20 degrees Celsius, and the practical test is that it takes a fingerprint under light pressure but still holds its shape and feels cool.

If it is shiny, glossy or slumping, it has gone too far. That is worth knowing because the visual cue is more reliable than any timing.

One recovery tip if you do overshoot: a partially melted block can sometimes be brought back by chilling briefly and then working it with a spoon or a mixer, which mechanically restores some plasticity. It is not as good as never melting it, and it is much better than starting again.

Worth knowing what each part of the egg needs, because it explains why partial results look the way yours did.

Egg white sets at a lower temperature than yolk. So a flask that settles in the middle of the range gives you a fully set white and a yolk that is soft or liquid — which is a perfectly good soft-boiled egg and not what you asked for.

If the yolk was still runny, your equilibrium was in that window. More water, hotter start, longer time, and it moves up.

One food safety note: this method sits the egg in warm water for a while, which is fine when the temperature is high. If your ratio is poor and the water settles somewhere lukewarm, that is not a good place to leave food. Err towards more boiling water rather than less, for two reasons rather than one.

On whether the foil is the safety feature people think — the honest answer is that the seal is not the primary protection, and it never was.

A determined person can get into almost any package. Cartons in particular can be entered from the base or a seam and resealed. So the foil is not a barrier against a serious tampering attempt; it is a tell that makes casual interference obvious and that guarantees the contents were sealed at the factory.

The actual protections are the supply chain, the packaging integrity as a whole, and the fact that food tampering is rare and heavily investigated.

So the practical advice is to look at the whole package rather than fixating on the foil: unusual weight, a soft or bulging carton, leakage, a bad smell on opening, dates that do not make sense. Any of those is a stronger signal than the seal.

The most reliable indicator is not the seal at all, it is the pressure.

Give the carton a gentle squeeze. An intact carton resists — you can compress it slightly and then it pushes back, because the contents and the small headspace are enclosed. A carton whose seal is broken lets air out as you squeeze, so it keeps giving and does not spring back.

That test works through the packaging without opening anything, takes two seconds, and is much harder to defeat than any visual check.

Secondary checks: the cap's tamper ring, if it has one, should be intact; the foil should be flat and undisturbed rather than dished or wrinkled; and the carton should show no puncture marks, particularly near the corners and the base seam.

Worth adding that stone and steel cubes have a hygiene consideration people forget: they go from a drink back into a freezer and get reused, often with a rinse rather than a wash.

Ice is used once. Reusable cubes need washing properly between uses, and the porous stone ones in particular can hold residue. Not a reason to avoid them, and a reason to treat them as utensils rather than as ice.