Some timber or other shelving type material (see next step).
Hook and eye strainers / turnbuckles as they are sometimes called (1 per shelf). I used the smallest I could find, which are 14mm OD a the buckle, with M5 (ie. 5mm diameter) threads. Such as these from Screwfix
, or there is a greater variety at absoluteindustrial
as suggested by Kroner78. These should have a minimum reach of 160mm ideally, but this can be extended with ess hooks or some chain perhaps.
Screw hooks (2 sturdy hooks per shelf - 4mm diameter ones are best, such as these from Techni-cable
). Depending on the height of your bottles, you may need some ess hooks too to help the strainer reach between the upper and lower hooks (such as these at Warehouse Direct
, although they're cheaper in a regular hardware shop).
2 x 32mm Glass plates such as these from Best
are handy for securing the top shelf to the wall if you are going 4 shelves or higher.
Beer bottles (2 per shelf). All the same brand/height/shape preferable. Wash them thoroughly in hot soapy water - the longer they soak the easier it will be to get the glue off. Allow to dry.
You will also need a 32mm flat drill bit or, better still, a Forstner drill bit
and a power drill.