lidless (
http://definr.com/lidless)
adj 1: not having or covered with a lid or lids; "a lidless
container" [ant:
lidded]
2: having no lid; "a lidless container"
3: without having the eyes closed or covered by the eyelids;
"to an eye like mine, a lidless watcher of the public
weal"- Alfred Tennyson [syn:
sleepless]