Heyy Cindy! Such a good question - I tend to store it in a dark glass (amber) bottle that closes tightly and then pop it in the fridge. However, I would usually use it within a week. I have a feeling if you keep it longer, the aloe vera juice might cause some funky smells. If you want to use it for longer, it's also good to add some sort of natural preservatives just to be on the safe side - for example rosemary extract, or vitamin E if you have an oil-based shampoo. Always check if it smells or looks a bit odd before using, especially if using all natural ingredients and liquids (like here, we are using aloe vera juice and tea). Good luck and let me know how it turns out!