EcoDecors 23" x 15" Teak Shower Bath Floor Mat - Natural EarthyTeak Finish

My friends, this is a solid slab, right? In other words, it does not bend or curve to follow the contours of a bathtub if placed *inside* the bathtub?

Would it be difficult to disassemble it completely, so the boards could be rearranged to form convex ends, instead of concave? Are screws accessible?

What is the thickness?

Is this flat? The photos make it look angled.