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Ordinarily, when using the ketchup bag, we have squeeze
the sauce towards the other end because of the pressure,
but sometimes we still get ketchup on our hands.
To solve this problem, combined the sauce packet with the cardboard
and fold the sauce packet in half to reduce the space. This results in
two ways of usage for different situations.
Yu-Ching , Hsieh En-Ching , Chu Hui-Kai , Wang