Nah, I don't think the glass was an attempt at sabotage, I tend to go more with the 'blender theory'. He really didn't make too much of a big deal about it in the end and it was all kind of glossed over really.
I must admit I thought Thomas and Carla were doomed to fail once I saw the poached egg in the soup and the time frame again! What on earth do they all do for 2 hours, I am sure by then they're all sick of the banter and small talk.
It's definitely been the most 'entertaining' of all MKR series to date!