I bought both the balls and a lid - this lid: EVERIE Collapsible Hinged Sous Vide Container Lid for Anova Culinary Precision Cookers, Fits 12,18,22 Quart Rubbermaid Container (Corner Mount)
But the neck of holeid is too narrow for my Anova. So I've been using the sous vide balls. I rather like them - how do they get dirty? I've only used my Anova twice so far, but they haven't gotten dirty.