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In some poor areas, most of the children lack a set of matched feeding-bottle and pacifier to drink milk. Their parents always use bottles without a matched pacifier to feed their children because they have no money to buy it. We have designed a pacifier that applies to feeding-bottles with different sizes of caliber. It is a kind of modularized design to match the bottles that a family only have. The multi-caliber can help the poor family to feed their children without buying the matched feeding-bottle.