A unitary system of government, or unitary state, is a sovereign state governed as a single entity. The central government is supreme, and the administrative divisions exercise only powers that the central government has delegated to them.
So, preventing an infestation of ants or getting rid of ants is a matter of closing entry points, repelling them, and practicing daily routines of cleanliness. 1  Follow them. 2  Close gaps and/or apply natural repellents those entry ways.  Practice cleanliness and routine maintenance.
1 The reason for the screw on top, is so that ants don't get to the tea. 2  Let the tea sit in the sun for most of the day, a prime full sun location is best.  When bringing the tea in, boil one cup, and then mix it with the sugar (but, in the summer, the heat from outside can be enough to dissolve the sugar).