Well in that case it will still have been on the MD83 as the new 737-800s dont arrive until the end of the year. Now I am no expert on flying distances (apart from being able to tell how long a flight will take) however I would imagine this is a long flight for an MD83 to take.
This is in no way excusing the toilet, food or sick bag.
However with all due respect loobysue - the information you have posted is from Tripadvisor on a post which you have responded to and on there it certainly doesnt seem like a daughter and a friend of yours - in fact it seems like you hardly know them.
By all means if you have a valid complaint then air it - but dont go stealing others.
On the other hand, I think your petition is a worthwhile cause and I have signed up.