This is my far the easiest to use most simple way to make your own liquid culture from a syringe of spores on the market anywhere! There or just a few simple steps, inject the spores and wait a week and then fill up syringes and inject your mushroom . And you can even use some of that freshly made liquid culture to grow more liquid culture by injecting it in a fresh pile of mix theoretically and extending one sports syringe infinitely! And in my opinion the vials are the perfect size, 80 ml,, not a large mason jar filled with more then most people will ever use at one time and may struggle to use before it goes bad. You just can't go wrong using mushroom supplies liquid culture mix!