Review on Valleycomfy 4PCS Bling Car Coasters: Sparkling Black and White Rhinestone Cup Holder Accessories - 2.75 inch Anti-Slip Silicone Coasters for Universal Vehicles by Joey Quade

My biggest problem with them is that when the car heats up the glue starts to melt and gets very sticky, which is almost worse than the stickiness of spilled drinks. And because the glue melts, the rhinestones, which are just a metal chain, will warp and move or fall out. They are very cute and go well with my cup holders (except for one of the front ones which is a bit smaller). But the fact that they can't withstand intense heat is something to consider if you have hot drinks on them or if you live in hot weather.