This square flask has other capacities to choose from. The capacities are 9/7/10/12/15oz. The method of making a square hip flask is to first cut the stainless steel sheet into a fixed size, and then put the stainless steel sheet into a mold to form a shape. Finally, the two halves of the same semi-finished stainless steel hip flask are welded together, polished to smooth the surface of the hip flask, and test the water to test the closure of the hip flask (special inspectors will perform the test to ensure that the hip flask is 100% sealed) and Spray paint and print your logo
