I wouldn't buy anything additional. Look around your house and I am sure you have extra makeup bags from different promotional items like Ipsy, Clinique, etc. Just use different bags for different items. I could probably find 10 or 15 makeup bags just looking around my house. Heck, you could even just use quart/gallon size zip top baggies and that would also help keep things from getting wet. At least with baggies you can pretty easily identify items by categories.