I've used it about 10 times, filling it with hot water. The tea strainer has not been used. *No box or instruction manual.* This is a 0.45L stainless steel vacuum insulated teapot, convenient with a lid and strainer. - Brand: THERMOS - Capacity: 0.45L - Features: Stainless steel vacuum insulation, with lid and strainer - Usable: Dishwasher safe, glossy finish Thank you for viewing. Please purchase if you understand the item based on the photos. Please refrain from purchasing if you are overly detail-oriented, fastidious, or slow to provide feedback. Thank you.