Possible Clues:

• Try having a pipe in the laboratory
• Laboratory item (for babies?)
• Science lab glassware
• Glass item in lab
• Underground to the Oval?
• Try to get a pipe into the lab
• Elements taken separately from matchbox used by chemist
• One may be used in a lab in experiment on pipe
• Small glass cylinder with one end closed, used in laboratory
• Try the pipe in the lab