Full Circle Brumi FC17510K Cold Brewer Portable Pour Over Coffee Mug, 12 oz, Black

is it microwaveable?

What is the best way to clean the mesh screen? Bottle brush?

Is there a cover for this cup? I work outside and put my bottles down on concrete all the time and there is a chance it may shatter.

I read one review saying it's not leakproof at all. Has everyone had the same experience?