TUNDRA ICE Secret hidden flask ice pack by Txdeals4u On the outside, this novelty flask looks like just another ice pack but it's actually a secret flask to carry your beverage anywhere. You can carry this secret flask in plain sight in your ice cooler, ice chest, hand bags etc, without raising any suspicion. 14oz (414mL) capacity. Big enough for one 12oz bottle of Beer 1" wide mouth opening. No need for any funnels. Excellent advantage over similar products on the market. Double wall cap for extra protection from leaking. Food grade BPA free material. Full twist leak proof cap. Reusable light weight material.