Colour:Silver | Size name:3Milton woofer tiffin is made from 304 stainless steel outer body with wireless bluetooth speaker. This insulated double walled vacuum water bottle is designed for maximum temperature retention that keeps your food hot without altering their temperatures for a prolonged period of time. Woofer tiffin includes woofer tiffin lid speaker usb to micro usb charging cable 3.5 mm audio cable instruction manual. It is easy to carry. Cleaning instruction: To clean the tiffin twist to separate the speaker lid from the tiffin body. Clean the tiffin separately avoid damage to the speaker. Hand wash recommended use an non-abrasive cleaner to clean the speaker wipe with a damp cloth.