It's an age-old dilemma facing pub regulars and clubbers – how to enjoy a quiet conversation over the racket of fellow revellers and blaring music.  

Now a Scots design student has invented a revolutionary device, shaped like a goldfish bowl, that allows drinkers to enjoy a quiet chat – no matter how loud their fellow drinkers are shouting or how high the volume is on the jukebox.

The lightweight speech bubbles, which filter out noise, come in two sizes – large for couples and a smaller version for individuals.