FWIW, the photo of the single bottle is definitely one of the returnable/refillable ones, as are all those in the crate.
You can tell by the large wording around the base if you zoom in and the shape of the crown seal (there are some close-ups of the refillable CUB and other returnable bottles in
this thread) - the not-to-be-refilled versions have a more diminutive roll at the top beneath where the crown seal is.
If I didn't already have 300-odd Pickaxe bottles I'd be tempted to pick up some of these!
Cheers,
Oliver