Silicone Cup Lids with MOUTH SEAL for Coffee Mugs & Tea Cups [Set of 4] - Anti-Dust, Spill Proof, Keep Drink HOT 4 reusable lids fit cups & mugs with approximate inner diameter of 3"1/8. Exact dimensions are in Product Description below. 100% leak-proof Silicone Lids, prevents drinks from spilling out. Keep bugs, sand, and dirt out of beverages & Keep coffee or tea hot much longer. Food Grade Silicone, FDA approved, BPA-Free, Eco friendly, Microwavable, Oven and Dishwasher safe. 100% MONEY BACK GUARANTEE. If not satisfied, we'll give you a 100% refund within 90 days of purchase--NO QUESTIONS ASKED. That means you'll love them, or they are free!