To get an container do:
    object cobj;

    cobj = clone_object("obj/container");

For customization the following routines are available :

You must call these functions (use call_other()):

set_name(n)
    string n. Sets the name and short description to n.
    Sets long description to short + ".\n"

These are the optional functions:

set_short(s)
    string s. Sets the short description to s and the long to short + ".\n"

set_long(l)
    string l. Sets the long description to l.

set_read(r)
    string r. Sets the read string to r. It is read with the command "read <id>"
    where <id> is the name, alias, or alt_name of the container.

set_value(v)
    int v. Sets the selling value to v.

set_weight(w)
    int w. Sets the empty weight to w.

set_max_weight(m)
    int m. Sets the maximum weight that the container can contain to m.

set_alias(a) { alias = a; }
    string a. Sets an alias name to a.

set_alt_name(t) { alt_name = t; }
    string t. Sets an alternate name to t.