Because you can buy your very OWN "Guaca Bowle" to whip up guac on "Sunday Funday" (this is not a regular Sunday, it's one where you have "fun" and finish up with an episode of True Detective).
Of course, if you're in the know, you refer to yours as a molcajete. Here's a quick explainer on how they're made and used:
It's half the price of Jeb's, but it also doesn't include the promise of his ~secret recipe~ at some point in an undetermined, increasingly elusive future.