Provided is a cap device for home use to temporarily cover the stoma resulting from a urostomy, colostomy or ileostomy procedure. It provides a favorable means of preventing leakage during routine cleaning around the stoma during the ostomy pouch replacement process. The device may include, in any combination, use of a flexible elastomeric material for creating low suction to assist with retention, a shaped lip for comfort and sealing, a disposable liner, or internal absorption material to help avoid spillage and leakage.