Design Go Sonic Traveller Toothbrush - 840 Gone are the days when using travel products meant compromising your health. This funky, multi-coloured, pack-away, non-disposable sonic toothbrush allows the replaceable bristle head to vibrate at more than 20,000 micro vibrations a minute. The Sonic traveller comes with its own hygienic protective case, an extra head and 1 x AAA battery.