Do you want to just store the bottles up right or on their sides or move a dozen bottles at a time?
Off licences often have strong six & 12 pack empty cartons they are happy to get rid of . A lot of super markets are so worried about the green police causing a stink that they only ever recycle via a licenced waste carrier .
Storing bottles on their side.
I got hold of 30 mtrs of perforated 100 mm dia land drain tube , cut it in 310mm lengths on the band saw . After putting a 1" square strip across an alcove to where the front of th tubes would be I laid the tubes across it and then filled the whole alcove to chest height with empty tubes Then filled it with full bottles .
As I used to bottle twenty to sixty gallons of home made wine each year it soon filled up . So I then did the same in an outbuilding , every six rows up I laid a 12 " wide shelf of 1/4 " ply across the bottles to stop the tubes crushing those below that might become empty .
After a few years I resorted to laying my bottles noses to the middle on two layers in those big plastic bread trays that have fold over flaps at the ends to allow you to stack them up on top of each other .
Eight trays in each stack held a lot of bottles , there were four such stacks as well as the wall racks eventually .