For most things, choose a design, and then decide on the item you want. For many items there are options such as T shirt size, colour etc. Fill in the options for the item you want then click on the button for that item. It will then be added to your shopping basket in a similar way to the zines. You can add as many things with as many designs as you want.
Coasters are special.
You can order a set of four all of the same design using the method outlined above. Then a page with all the designs that are compatible with the chosen design will be displayed. The pictures displayed will all be by the same artist.