Abstract: A bottle including a hollow removable closure. The bottle can include a base portion enclosing a substantially hollow interior, the base portion including a mouth in fluid communication with the interior, a removable closure enclosing a substantially hollow reservoir, the removable closure including an opening in fluid communication with the reservoir and a stopper removably sealing the opening, wherein a portion of the closure is receivable within the mouth of the base portion such that the opening of the closure is received through the mouth and a liquid-tight seal is formed between the base portion and a portion of the closure.