Well, my answer is obvious and makes me sound like a broken record, but it would have to be the Butterfly Bait. But that's only because you said "favourite item you've
bought." My
favourite thing from Mom and Pop's comes free with every order--the personal attention and genuine caring they have for everyone who visits.
But of the things that can be bought, I've gotten some of the Ego K's for the wife, a Vmax, a few of the sub
tanks, some drip tips...but my favourite thing so far is the Butterfly Bait. At the risk of premature feline/bag separation, though, that may be changing here in the not-too-distant future...
My wife's favourite thing, by the way, is Scuba's Orange. So far it looks like the favourite things are also Mom and Pop exclusives