Gas -tight nipple structure that expands

The utility model provides a gas -tight nipple structure that expands which is in general feeding bottle and nipple combination back to constitute in this nipple of filter screen external member embedding, wherein, this nipple has portion of sucking and plane end, and this plane end has an intake duct, this filter screen external member one end has a conical filter screen portion, and the hole that runs through is laid on the inclined plane of this filter screen portion, and this filter screen external member other end has more than one and links the fin, and it can be propped zhang dingwei atthe inner edge of nipple, when bubble during attached to the hole on this inclined plane, abolish because of the surface tension pressurized is different to avoid the mixed liquid of bubble to get into in the abdomen and produce the physiosis, reach non - gas -tight and expand the nipple and also have the gas -tight function that expands, and the gas -tight expands the nipple and more promotes its gas -tight effect that