Product link：
Stencil： https://www.amazon.com/LETS-Stencils-Alphabet-Painting-Reusable/dp/B0CP1QPPM8
Coaster： https://www.amazon.com/LETS-RESIN-Coaster-Silicone-Octagon/dp/B0BKZ6ZH2S
Black epoxy：https://www.amazon.com/dp/B0CLNK61CM