I was hoping that the black plastic cap would be invisible in the dark.

"It is," Houston admits, removing the plastic cap with his teeth.

To use the spray, first remove the safety clip and plastic cap.

The plastic cap of the junction box had been unscrewed and removed.

It has a red plastic cap on one end of it.

To use the spray, first remove the plastic cap.

He tried to pull the plastic cap from the end of the needle but it would not come off.

The test tubes are covered with a color-coded plastic cap.

The plastic caps are opaque for tubes with a normal vacuum.

These starter programs are stored in a white plastic cap on top of the pen.