As of: March 14, 2024, 7:00 p.m
By: David Holzner
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Many cups have notches on the bottom.
Have you ever wondered what they are for?
The answer is simple.
Whether for coffee in the morning, tea in the afternoon, or as a form for a cup recipe.
Most people reach for a cup every day.
They come in different shapes, with funny sayings and made of painted ceramic.
The designs vary.
But have you ever taken a closer look at the underside of everyday dishes?
Many cups have one or more notches there.
These have no decorative function, but are very practical and serve a specific purpose.
Notches on the bottom of the cup: That's why they exist
Many cups have them, many don't: one or more notches on the bottom.
© Pond5 Images/IMAGO
Everyone has their own rules when loading the dishwasher.
Usually you put the dirty cups in the dishwasher with the bottom facing up.
But maybe you know the problem that often comes with it.
When you take out the cups, you suddenly see a rush of water.
The reason: During the rinsing time, rinsing water collects on the slightly inwardly curved undersides of the cups.
This probably wouldn't have happened to a cup with indentations.
The cracks at the bottom edge ensure that the rinse water can drain away.
Practical, right?
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Practical function: This means that the cup does not stick
That's not all: the practical design also has another function.
If you've ever spilled coffee, you may have noticed that some cups stick to the table.
If so, you have a cup without notches on the bottom.
These are intended to prevent or at least weaken this suction effect.
According to
Swr.de
, this effect is also the reason why most glass bottles have “ripples” on the bottom.
If you take a cold bottle of water out of the refrigerator and place it on a table, the cold air will contract in the cavity under the bottle.
This creates a negative pressure that causes the bottle to become stuck.
The ridges on the bottom edge ensure that air can escape, similar to the notches on the cup.