Sanitary pads that are reusable? Are you kidding me? Nope! Actually, I would like for you to reconsider using them if you have thought about them before. And, if you are new to this topic, please consider the numerous advantages that come from using washable feminine towels.
Do the math and add up the price for disposable ones, how many of them you are using per month and throughout the year, for how many years of your lifetime...
True, it will take a short while to get used to wearing them instead of disposable ones. However, you will feel the difference soon. These natural and washable cotton pads feel much nicer on the skin and they are healthier than their alternative chemical ones.
Yes, the plastic ones seem so much easier to handle and appear more convenient, at least most of the time. On the other side, however, they are absolutely not good for the environment. They contain quite a few chemicals (e.g. BPA and other plastics and fragrances and/or odor neutralizers) which can cause health issues to this sensitive part of your body. Restricting the free flow of air, they create a warmth and dampness in this area which can cause growth of bacteria and trigger yeast infections.
What to do with the pad after it has been used Keep a bucket (preferable with a lid on top), filled with cold water. Add a few drops of bleach to the water if you don't mind to do so. This will prevent smells and will prepare the pads for the wash later on. Put the used pads into it. Empty the bucket and refill the bucket frequently, rinsing the pads while doing so. Wash them later on, preferably at 60°C.
Store the washed ones in a non-transparent plastic or cardboard container close to where you will need them. Keep some of them in your handbag: put them inside a small bag along with a plastic zip lock bag for the used ones to take back home to wash.
Where to buy reusable sanitary pads Search for them online (e.g. at Amazon where you will usually find them). They come in different sizes and shapes. I've bought mine a few years back. I'm using Imse Vimse pads and I'm quite please with them. They are all white, including the inserts. Nowadays, they come in all kinds of patterns and colors.