sentence: most ofrendas contain three levels or tiers : on the topmost tier are placed photographs of the deceased and/or images of various saints which are positioned in a retablo which forms the back of the altar ; on the second tier are placed food items including such things as mole , candy , pan dulce , and especially a sweetbread called pan de muerto , as well as bottles or poured shot glasses of tequila or mezcal ; on the bottom-most tier are placed item such as lit candles , a washbasin , mirror , soap , and a towel so that the supposed spirit of the deceased see themselves and can refresh themselves upon arrival at the altar .