G.A.K Stainless Steel Vented LID for 1 QT. Canteen Cups.Please Note: This lid does not fit Genuine Issue Canteen Cups and is specifically made to fit the G.I. Style Stainless Steel Canteen Cups. Heavy Gauge Stainless Steel Stainless steel; food grade. This lid does not fit Genuine Issue Canteen Cups and is specifically made to fit the G.I. Style Stainless Steel Canteen Cups.