Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Natural Flood

Unbelievable leaks and spills. In spite of adhering to the directions "DO NOT FILL BEYOND THIS LINE", bottle constantly leaks and spills. Particularly when you warm the bottle. If you don't mind frequent dripping then purchase, if you don't have time to change your baby due to being drenched by leaks don't buy them. They are horrible portable bottles as well.