I would probably use that for succulents, but ideally it has to be grown outdoors, like haworthias, gasterias, sedums. These plants won't mind shallow containers, they just grow shallow roots. During winter time, you may bring it indoors to protect it from harsh winter conditions. My area has mild winters so I can leave them outdoors even during winter.
I recycled before a pastry pan and planted succulents in it and they enjoyed it. Just got to make the media gritty and well draining, container must have drain holes, top dress the soil to protect the base of the succulents from sitting in too wet media.
But eventually had to move them to new containers since the pastry pan eventually broke apart. And the plants are outgrowing my container.
Mar 2016
Apr 2017