Yazid bin al-Asamm (may Allah have mercy on him), who was an orphan under the care of Sayyidah Maymunah (may Allah be pleased with her), narrated that a tooth-stick (miswak) always remained in a vessel with her; if some work or prayer kept her busy (then so be it); otherwise, she would take the tooth-stick and clean her teeth with it.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20414