In order to meet the majority of customers at the same time in line with the responsibility of consumers, the lid of this product uses food grade silicone material lid (can be boiled water and environmental protection rest assured), please do not take those PP on the market with plastic lid to compare the price, a penny a cent goods, I hope you can understand. Thank you for your large quantity (if you want low PP plastic cover, please contact customer service, the price will be much lower) product default silicone cover shipment merlin