1. Elemental Kitchen Reusable Coffee Cup, 18oz/ Glass Travel Mug with Flip-open Lid, 100% BPA Free, Microwave Safe, Anti-slip Silicone Sleeve (Black Pink) If you’re looking for a reusable coffee mug that is both microwave safe and anti-slip, look no further than the Elemental Kitchen coffee mug. This mug is made from 100% BPA-free