Not an ultralight hiking toothbrush perhaps. For that most folks cut their standard toothbrush in half, but this one is really good for travel, being very slim, compact and light and giving very nearly as good a result as a rechargeable such as the Braun or OralB, but without needing a power socket or all that extra space/weight. It is also very comfortable and non-slippery to the hand. Colgate® 360°® Optic White™ Battery-Powered Toothbrush: 36 grams inc AA battery, comes in Soft and Medium. I have tried a heap of battery powered toothbrushes over the years: this one is by far the best, smallest and lightest. At that weight too I have no doubt some people will take it (and some floss) hiking too. The floss can come in handy for repairs, or for fishing: http://www.colgate.com.au/en/au/oc/products/toothbrush/colgate-360-optic-white-battery-powered-toothbrush
See also:
http://www.theultralighthiker.com/self-threading-needles/
http://www.theultralighthiker.com/fishing-with-floss/
http://www.theultralighthiker.com/four-gram-fishing-handlines/
