When you run out of a component it may be re-ordered accordingly, for your convenience. It's always better when you plan ahead. Small re-orders may seem frugal but it can make things more complicated, and less economical. Once you get familiar with usages, you should order up, and of course...ahead. Maintain your supply, don't run out, and then don't worry...To avoid any feelings of 'product-supply-anxiety' from effecting the way and how much you use along the way.., re-order larger sizes... or come and refill your Magicpack, and extra containers from any re-orders...and relax:-) It is learned:-) THEN be surprised how long it lasts;->