original: they can also be used as a general test tube substitute particularly when a larger volume is desired .
simplifications: they can be used as a general test tube substitute particularly when a larger volume is desired . when a larger volume is desired they can be used as a general teste tube substitute . they can also be used as a general test tube substitute particularly when a larger volume is desired . they can also be used as a test tube substitute when a larger volume is desired . 1 . they can also be used as a general test tube substitute particularly when a larger volume is prefered they can also be used as a test tube to fill in when a larger volume is desired . they can also be used as a general stand in for a regular test tube , particularly when a larger amount is wanted . for large volume , they can be used as a general test tube substitute .