The 12oz Timolino has an interchangeable infuser basket and mesh filter, 18/8 Stainless steel inside and out, with food-grade silicone strainer. Cap disassembles and silicone screen disengages for quick and easy clean up. Vacuum insulation keeps drinks hot or cold for hours. CARE INSTRUCTIONS: Hot, soapy water: To increase the lifespan of your Timolino, we do not recommend using a dishwasher as it might affect the vacuum seal and/or paint. Instead, we recommend hand washing your bottle or mug with hot, soapy water. Rinse thoroughly to remove any soap residue. Allow to air dry (especially gaskets) for best results. Rinse after use: Aim for rinsing your mug or bottle immediately after each use. By doing so, there is less of a chance for dark stains to build up over time.