Been heating my shaving water in the microwave. I usually place a measuring cup in a large bowl, fill both, heat both at the same time to just shy of boiling, then pour the water from the cup into my current shaving mug, and use the water in the bowl for the towel.

Can I replace the measuring cup with a wooden shaving mug, or just pour the not-quite-boiling water into the wooden mug to soak the brush, without fear of warping or cracking the wood?