Large tea mug with infuser and lid

I am really enjoying this tea mug. The threading is only on the inside of the mug. The outside of the mug is smooth. It has a thin lip. The wooden handle is large enough to comfortably hold. The infuser works great! The lid doubles as a place to rest your infuser while you drink your tea, or as a lid if you want to keep your drink warm for a longer time. I have poured hot water into the mug, and have used it in the microwave. Both methods are safe with this borosilicate glass. Happy tea time!