Nalgene lid that holds supplements (or snacks). So cool! The Pillid is one of those accessories that makes you think to yourself, &quot;Why didn&#x27;t someone think of this sooner?&quot; Pillid screws onto the top of a 63mm Nalgene bottle, like our best selling 32oz WM, and can hold small items like pills, or a gym key. It&#x27;s like having an extra pocket, or secret compartment.