Came here to mention Big Clive's salvaging. Haven't tried it myself yet - the feral youth around here tend to be more whippet oriented than vaping, sadly.
My town is more a "active nightlife" town, so while I do see a far number of Whippets cartridges (though, thankfully, a lot less recently), you mainly find more discarded disposable vapes on Saturday and Sunday mornings/afternoons then you will whipped cream cartridges.
