Offering bowls are a very useful addition to any altar, I have an extensive selection that I use to hold herbs, salt or for when making offerings of food and objects to my ancestors and Patron goddesses.
Ceramic bowl with gold decoration - 10cm diameter
Onyx marble bowl - 7.5cm diameter
Ceramic Ouija board - 16cm x 11cm
Ceramic Nautilus - 10cm diameter
Ceramic open hands - 14cm x 15cm x 7cm