Act as a product designer with 5+ years of experience in IoT home gadgets. Create a high-quality 3D render of a [minimalist/sleek/futuristic] smart coaster that monitors drink temperature. The coaster should have [LED color indicators] that change from blue (cold) to red (hot) and a [small LCD display] showing exact temperature in °C/°F. Include subtle [wireless charging capability] and show it placed under a [glass of iced coffee/cup of hot tea] on a [modern kitchen counter/coffee shop table]. Use soft lighting, realistic materials (ceramic/matte silicone), and show the product from a 45-degree angle with a slight shadow for depth. The style should be [Apple-like premium tech] with clean lines and no visible buttons.