Abstract: A combined sprayer container and refill container for containing a liquid concentrate for later dilution and which containers nest and interlock. A sprayer container including a sprayer head for spraying liquid contained in the sprayer container. The sprayer container also including at least one level indicia foro indicating a level to be filled to with the liquid concentrate for dilution. A refill container for containing a liquid concentrate for use in repeated refilling of the sprayer container. The sprayer container and refill container each including complementary surfaces to provide nesting of the containers one against the other. An interlock provided on both the sprayer container and refill container for interlocking the nested containers to resist separation of the nested containers.