Product Review

Features:
Guarantees to fit your beloved 30oz tumblers. Fits most standard vehicle cup holders.

Material: PP + crystal clear plastic, BPA free
Lid diameter: 3.94 inches / 10cm

Note:
It is easy to clean and dishwasher safe, but avoid using in microwave.
The air hole of the lid is designed to keep a same air pressure inside and outside the tumbler, making it convenient for you to drink water.
This lid will help with accidental tips and spills but not guarantee no leaks if inverted for a long time.