Review on 🚗 12pcs Sublimation Blanks Car Cup Coasters – Absorbent Ceramic Stone Coasters with Finger Notch for Easy Removal in Auto Cupholder. Keep Vehicle Clean and Protected from Cold Drink Sweat, Stains, and Spills. by Greg Anderson

The product could have been better packaged although it comes in small bubble wrapped boxes. When I opened the envelope I could see that some of them were either punctured or broken. Since they're matte, if you've never used them you won't know which side is the sublimation side as it doesn't have a clue (I had to google it. Use the smoothie side). As with any other surface, you must be careful to wipe it off (lime residue). After taking it out of the heat press, I noticed that half of it either didn't transfer or didn't transfer completely. Tried a few more. I think these are better with the background left white.