1. The bottle has expired
Although there is currently no data showing what kind of harmful substances will be produced after the bottle expires, there will be hidden dangers of bacteria in the bottle after long-term use, both inside and outside the bottle. Novice parents should remember that for the sake of the baby’s health, it is necessary to maintain Make it a good habit to replace the new bottle regularly.

2. There are cracks in the bottle
If there is a crack in the glass feeding bottle, it is natural to buy a new feeding bottle for the baby, otherwise it is easy to hurt the baby. In addition, if the plastic or stainless steel feeding bottle has scratches, it is necessary to replace the new feeding bottle for the baby. The scratch is a dead corner of hygiene. Any cleaning method may make the feeding bottle unhygienic. At this time, it will be more secure to replace the feeding bottle.

3. There is dirt inside the bottle
The dirt in the bottle mentioned here is not just the “black dirt” we imagined. If the baby bottle is soaked in milk powder for a long time, if it is not cleaned thoroughly, it is easy to form a layer of yellow substance under the accumulation of milk dirt, which is also an important “sign” that the baby needs to be replaced with a new bottle.