Newcomdigi Spill Proof Tumbler Lid ,Splash Resistant Cup Lid , Plastic Lid for 30 oz Tumbler COMPATIBILITY- this simple, reliable lid built to fit your 30oz VACUUM SEALED- Keeps liquids COLD or HOT longer due to its vacuum seal technology. Sealed with a surrounding black O-ring to seal in all its liquids.Has designated air holes on top of slider for airflow ergonomics which further helps in reducing splashing. EASY- Sliding open and shut closer that is straw friendly, great for on the go. SAFE- This lid is crystal clear and BPA free RISK FREE PURCHASE - If you are not completely happy with your Easy Whisk - no problem, simply return it and get a FULL REFUND, no questions