I purchased this from Nitori Deco Home, but I haven't used it much and have been storing it. □Product Description□ ● Can hold and carry a PET bottle ● Easy to carry with a handle ● Vacuum-insulated construction for long-lasting heat and cold retention 【Usable PET bottles】 Approximately 500mL~650mL PET bottles ※ May not be usable depending on the shape of the PET bottle. 【Material Type】 Inner bottle: Stainless steel Body: Stainless steel (acrylic resin coating) Lid: Polypropylene Packing: Thermoplastic elastomer 【Other Specifications】 ● Dishwasher: Not usable ● Microwave: Not usable ● Freezer: Not usable There are no pets or smokers in the household.