A clamp apparatus (10) for use in combination with a flexible sheet (30) of material (31) to cover a cooking receptacle (40) to prevent the splattering of foodstuffs in the interior cavity of a microwave oven (20), wherein the clamp apparatus (10) comprises in general a male clamp member (11) and a female clamp member (12); wherein the male and female clamp members cooperate to vary the effective length of the clamp apparatus (10).
