Wise Palace has made a very nice product with these drink coasters. They are sturdy and made of silicone. The Ice Ball Mold is pretty cool too. I like having round ice cubes instead of the normal ice machine made cubes when i make my smoothies. The fruit and stuff just goes around them so much better. Anyway they are a good coaster for any size cup and are thick. You can also use these as hot pads for pots or pans because they are heat resistant. Or as spoon or spatula rests when cooking. The drink coasters, holder and ice ball mold are all dishwasher safe so super easy to clean. These have made a great addition to my living room decor and have worked great. I would recommend these to everyone and would purchase more in the future. I received this product for free in exchange for my complete and honest review.