Dental hygiene is very important to me and my family. I have been drilling how important taking care of your smile is to my girls since they started getting teeth. Brush twice per day, floss, now we rinse with mouthwash, and see a dentist regularly. It is just part of how we live. Now that I am not in the bathroom with my older 2 brushing their teeth for them though, I worry that they are not getting all the areas that they should be because they are trying to get the job done too quickly. The Hello Kitty Firefly Light Up Timer Toothbrush has saved the day.ExpirationThis product has no expiration date or the manufacturer has not provided an expiration date.