Check the listing for details. Submarine Force Silent Service Flask USN. Condition: New. Listed at 25.00 USD. United States Navy Submarine Force 6 oz Stainless Steel Flask Mint Condition. Brand New! These 6 oz. Stainless Steel Flasks slip easily into a pocket. This popular product has been improved by replacing the hinged top versions with a simple stainless steel screw-on, removable cap. Made from high quality, food-grade stainless steel, our flasks do not contain BPA or any other toxins. Images are dyesub printed so they are in full color. Would make a wonderful gift for your favorite submariner! Please note that the image on the flask is much better than the picture shows. The images are crisp and clean! Thanks For Looking and Happy Bidding Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.