Compatibility: The 30 oz tumbler lids suitable for YETI, D·S, BJPKPK, WETOWETO, ALBOR, Toopify, MEZMUT Tumbler, and is suitable for tumblers with a mouth diameter of 3.74 in Safe to Drink: Made of food grade crystal transparent AS material, BPA free, sturdy and durable, not easily damaged, convenient for you to drink anytime, anywhere Easy to Use: The convenient sliding design allows you to easily drink with one hand and use safely while driving. The structure of the silicone ring has been improved to prevent flipping and displacement, ensuring the sealing of the cup Straw Friendly: Sip according to your way! Whether you prefer using a straw or sipping directly, it can easily satisfy you When driving outside, keep the beverage stable and not spill when shaking or tilting (can accommodate 0.3 inch/8mm straws) Leak Proof: Adopting a unique double sealing technology design, it tightly integrates with the cup mouth, effectively preventing liquid overflow Lids Covers Fit for YETI Rambler