- Material:Plastic. - Each flask is made of a durable BPA free food grade material. They are puncture resistant, leak proof, stand on their own when filled, and can even be frozen. - Each one can be filled simply by using the included funnel. Your favorite drink will be safely contained inside the pouch with our leak proof screw cap. - Not just for cruises!They are also great for sporting events, movie theaters, camping, fishing, golfing, or anywhere you'd like to enjoy a drink.
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