WWI Machine Gun Corp Hip Flask large pewter flask and metal stopper. £29.95 Sorry, this item is currently out of stock. WWI Machine Gun Coy - France 1914 Hip Flask This is a vintage hip flask with contemporary etching. It measures approx. 145mm tall x 100mm wide. The flask is stamped on the bottom, Sheffield Pewter Made in England and has a Manor Period company logo and batch number 2643. The condition of the hip flask is used vintage, the is a very small dent in the back but overall in very good condition.