Yeah, I think you can buy the Oxo carafe separately if you want an extra, but I haven’t looked into it. We transfer the brew concentrate into taller carafes so they don’t take up as much space in our fridge (I think they’re the 1L Anchor Hocking carafes with lids).
By the time we are pouring the last bit of the concentrate, the small amount of sludge stays in the carafe and doesn’t impact the cup!