The lock-back sip lid can be used for cold drinking cups and take away cups to avoid spillage, and do not need straws. A special design for reclosable lids to reduce leakage.  It is made of biopolymer PLA, 100% from plants. The material is featured in biodegradable, eco-friendly and 100% safe to health. The temperature resistance is from 0 to 40 degree Celsius. This lid is suitable for the rim 96mm diameter PLA cups.