Two weeks
For as long as the customer wants it to be kept open.
Actually I have kept my eyes open for about four minutes, but I had contacts in. With out contacts in I can only keep my eyes open for 45 seconds.
kipper
i kept the windows open whole night.
rings of cartilage
Many many airports around the world were kept open during 9/11.
Not exactly sure, I've never kept it after an hour. Plumbs drug formulary says 6hrs though.
The open door policy
cartilage
The Cream Poffs can go limp and flat.
no my friends
Like most fish, they lay eggs. Herring females lay their eggs in shallow open water and they sink to the bottom.