21 Flower-pots, flower-pots of porcelain flower-pots of earthenware, seedling flower-pots, flower window-boxes, self-irrigation flower window-boxes, utility vessels of ceramics or metal for household use, jardinieres, interior terrariums [for plant growing], plastic buckets, seed containers, flower-pot covers (not of paper), plant bowls, compostable bowls, flower-pot trays, flower-pot holders, flower and plant holders, spray equipment, spray nozzles for potting hoses, plastic spray nozzles, sprinklers, pots for watering, vases, irrigation equipment, hand tools and utensils for kitchen and household, included in this class