Generally speaking, the mineral water bottle cap is made of PE (polyethylene) and the bottle body is made of PET (polyester) or PVC (polyvinyl chloride). Some countries with fine garbage classification will "throw" the bottle caps and bottles into different trash cans, and tear off the trademark paper of the bottles in advance before sorting.
According to the guidelines for the classified delivery of domestic waste in Shanghai, mineral water bottles belong to "waste plastics" and recyclable waste. Before delivery, pour out the unfinished water in the bottle.
More standardized, in fact, is to press the mineral water bottle flat.
Garbage classification not only protects the environment, but also has obvious significance of resource recycling. Local garbage sorting is also to cooperate with local garbage recycling.
If your city has specific requirements for putting mineral water bottles, please follow the local requirements!