Soft cheese knives are designed to deal with the stickiness of soft cheese. When the cheese does not stick to the blade, it allows for pieces of cheese to be presented more attractively, with crisper shapes compared to cheese cut with standard knives.
Rest the colander on top of a large bowl or pot, or if it has the appropriate feet or base, put it directly into the sink, and pour. If you plan to set a colander in the sink, be sure the sink is empty and clean, and the drain is uncapped and open.