Stainless steel and a sleek six-ounce size means these cool and compact Surprise 21St Birthday Flasks travel along wherever you journey. Take them to the neighbors backyard party or off to the big game, all you do is fill and go. And since these stainless steel flasks love a good time, they're always dressed to impress with an attractive exterior and matching twist-off cap. Keep your 6 oz. flask close at hand in your purse or pocket to sip easily at parties, get-togethers, outings and wherever else your busy social life takes you. Whether you use your convenient carrier as an alcohol flask or soda sipper is completely up to you, ust remember to sip responsibly please. You can choose from all sorts of designs, you'll find something for everyone here. But if you've got a design in mind that you don't see, you can create your own flasks too. All you do is upload your original image via our design tool and we will do the rest.