Melladosrlkzl via Amazon offers this Stainless Steel Bracelet Flask with Funnel in Rose Gold or Rainbow for $13.99. Coupon code "N2T4RIWB" cuts that to $8.39. Plus, Prime members receive free shipping. That's the lowest price we could find from a seller that ships from the U.S. by $3. It holds 3.5-oz. and has a 2.5" inner diameter. Deal ends May 30.