These are the coolest nightlights! When the batteries run out of the lights it would be easy to switch them out!!! They take the 3 pieces AG13 button batteries and the lights have 3 modes, fast flashing,slow flashing and still. If you want customized saying on the jar just go to the bottom of this page and fill out the how can I help you section send me a message and click on the add to cart button and I will start making it for you. Satisfaction guaranteed 👌
Contact me with any questions about the procedure or customizations.