I created four coasters based on information we know on a few popular potions: Polyjuice Potion, Amortentia, Felix Felicis, and Veritaserum. Each square looks like it's on parchment with the official Hogwarts seal. All of our coaters are: - 4.25 ceramic tiles - Padded at the bottom so they don't scratch your table - Sealed with water resistant sealer (I wouldn't run these through the dishwasher, but you can wipe them with a cloth) - Sealed with heat proof sealer (should be safe up to 500 degrees; however, I don't recommend using them as trivets. I have tested coasters with hot mugs and things of that nature with no problems.) ----- Please be sure to check the "Shipping & Policies" section on each item to ensure that the processing time suites your needs. Most items in the shop are made-to-order and can take 7-9 business days before shipment. If selecting standard shipping, please be aware that USPS is taking 7-10 days (in some cases) to deliver 1st class packages due to weather & them closing mail processing centers. If you are concerned about shipping time, there is a priority shipping upgrade option when you check out. If you have any questions or concerns about processing time, please feel free to contact me. Thanks!! Happy shopping and thank you for your consideration in supporting crafters & small business.