Drinking and diving don't mix, but once the day of diving is done its time to relax and warm that chill from the day of diving. Show that you are a diver 24/7even when the cocktail hour has arrived. Square shot glass with pewter enameled dive flag or pewter enameled nitrox dive flag will measure your elixir and cut the chill. Shot glass makes a great gift for that diving (drinking) friend or significant other.