Peace of mind / Peace of mind

In our daily life will often encounter baby milk is hot to the case, test milk for the babyif the mother will unsanitary.
The product for this problem milk jug spout designed a thermal expansion and contraction of the plastic material.
This material overheating in milk at a time when thermal expander port is blocked milk can not be inhaled.
.When the milk is cool, the occurrence of shrinkage, the release of the spout, milk will be inhaled,