How to keep baby from running around outside? We plan to travel out of singapore soon and I am scared she's going to get lost. Has anyone tried wrist leashes?

along with this, please teach her where is she from and one of her parents contact number. one of the first things she learnt once she started to talk. I would also wrote down my mobile number on her hand (not palm) in big fonts whenever stepping in crowded/public places. you can also keep a paper with contact numbers in her pocket. just to be on a more safer side