If you don't prefer to use all of the strains availalble, be sure to enter "none" within the text box delivered. Picture my shock, then, when I traveled to Uruguay and learned that its milk only comes in plastic baggage. Non-resealable ones! Types you chop open up at the corner! https://sustainablemilkcartongabletop.blogspot.com/2024/11/the-versatility-and-sustainability-of.html