Possible Clues:

• Measure pipe for experimental purposes
• Examine public transport overseas from the laboratory
• Kin of a pipette
• Audition leading thespians ahead of unit going to Belgium - and in that, you will find your solution perhaps?
• Pilot from Bath, England, is observed under laboratory conditions
• Cylindrical glass in a laboratory
• Experimental glassware
• Try to put toothpaste into glass container
• Give the pips a try in the lab
• Trial container