https://www.amazon.com.au/Diamond-Marble-Granite-Fiberglass-Ceramic/dp/B07WC22HTP
Try these. Keep them cool with water, Start them on an angle, then straight up, otherwise you’ll skate all over the place Good luck :)
I have some of these https://www.amazon.com/dp/B07WC22HTP/ref=cm_sw_r_cp_apa_i_XoqLDbVSSWZDG
I thought about making one of the bigger joles., Though that would be enough. Or should o make several of the smaller size?