Planting succulents in containers has various benefits. Succulents are not fussy plants (or so we are led to believe! I have some that insist on lots of special attention and tender loving care!) and will grow just about anywhere. Controlling water requirements is easy, for there are some that thrive with hardly any water and a few, like Crassula imperialis and Echeveria imbricata, absolutely thrive on lots of water. Containers don't have to be expensive and anything goes, from glass bottles to rocks with a hole or an indentation, tins, wooden crates, terracotta pots, concrete blocks, bricks, cups and saucers, wire baskets, pots and pans, plastic containers, dog baskets and even cardboard boxes.
Many (or most!) of my succulents and cacti are planted in containers because of the severe winter frosts we get here in Tarlton (Gauteng, South Africa). It enables me to bring in and winterize those that do not tolerate frost. Most succulents have no problem with cold winters and many of them need a cold winter to flower, but being plants that store water, frost is deadly. I almost lost my whole Echeveria imbricata collection to one such severe frosty winter.