While I been using Waterdrop daily for hydration for over a year now sadly my purchasing is coming to an end. I can't understand how this company can't keep the popular flavors in stock. I have 4 flavors that I have been buying since August of 2023 and now I can't buy any of them because SOLD OUT. This is not acceptable. So while I relied on Waterdrop for my daily hydration for over a year sadly it comes to an end. I do not know how this company can improve its inventory but it needs to. Thanks so much for forcing out a good customer. Good to luck to Waterdrop. Best Regards, Steven Celentano