Container

Why is the pickle container always open?
Because it's ajar.
A Blonde at the Doctor's
A Blonde at the Doctor's A blonde woman came in for a routine physical at the doctor’s office. “There you go," said the nurse as she handed her a urine cup. “The bathroom is over there on your left. The doctor will see you in a few minutes.” A few minutes later the lady came out of the bathroom. She hands an empty container back to the nurse. With a relieved look on her face she says: "Thank you! But they had a toilet in there, so I didn’t need this after all.”
Why did the scientist use a drink container to communicate with dolphins?
Because a bottle knows dolphin.