It happens sometimes but thankfully this time, it's happened at the beginning of the process! I had an enlightening meeting with a Forensic Biology Lecturer at De Montfort who answered my varied questions. As a result, my clear bottles will need to be repurposed. The good news is that sometimes the artwork you intended to make ends up better as a consequence of these changes. Another bonus from this meeting, is that I will now be able to ensure that the science is watertight.