An electric toothbrush is more efficient than a regular toothbrush. This model is powered by a rechargeable battery and you also get a practical case to store it in during trips.
From Amazon
Philips Sonicare ProtectiveClean 6100 Rechargeable Electric Power Toothbrush, White, HX6877/21
Notino
Philips Sonicare 6100 HX6877/28 sonic toothbrush White 1 pc
OnBuy
Philips Sonicare HX6877/28 Electric Toothbrush Adult Sonic Toothbrush, Silver, White Electric Toothbrush (State, Battery, Built-in Battery, Lit