5oz food grade stainless steel: it is made of 18 / 8 stainless steel. We need to clean it for more time. Clean this flask with Baijiu and spirits. A great gift, it can store a plush toy. We recommend it to your best friend or single party, birthday gift,mother's day gift, etc. Go with a bottle of your favorite wine. Cheers. Tips for first use and storage instructions: 1. Before filling the vial for the first time, rinse the interior with clean soapy water. 2. Always empty the vial after use, without severe dripping, high temperature or long-term acidic liquid. Rinse thoroughly before refueling. 3. Do not store the alcohol in the vial for more than 3 days. Please thoroughly clean and dry it when not in use. Easy Pour Funnel is attached, beautiful Bling. This product comes in time. And it is a very elegant flask. Perfect gift. High quality, cute, small but suitable for wallets of any size... According to your level, about 3-4 clicks. It may be mistaken for a wallet.