A portable waterproof diaper bag is a storage bag designed for babies, mainly used to store diapers, wet wipes and other items. Its use is relatively simple, and the following are some basic steps:

1. Choose the right size: Choose a diaper bag of the right size according to the number and size of diapers you need to carry. Generally speaking, diaper bags are available in small, medium and large sizes.

2. Open the zipper: Diaper bags usually have two zipper pockets, which can store wet diapers and dry diapers separately to avoid cross contamination1.

3. Place diapers: Put clean diapers in one of the pockets, and if you need to carry wet or dirty diapers, you can put them in the other pocket. Make sure the diapers are placed neatly for easy access.

4. Close the zipper: Tighten the zipper to ensure that the diaper bag is well sealed to prevent moisture from leaking out.

5. Easy to carry: Diaper bags are usually equipped with handles or can be hung on a stroller for easy carrying. You can hang it on the handle of the stroller or carry it directly by hand.