This solid wood urn has a wooden screw on the bottom through which it is filled. This size is 4 x 4.5 x 4h, internal cavity volume is about 23 cubic inches (about enough size for a small to medium pet). The urn pictured is walnut with a cherry stripe and screw plug. Other woods and custom sizes available, best to contact me directly. Free engraving, finished in satin lacquer.