Just a quick one here. On getting my 3yr old out of her seat(behind passenger) I noticed a pool of water in that little cubby hole at the side of her seat nearest the window. Now I can't be 100% that it's from my daughters beaker of water but IF it's not where has it come from & how do I stop it from happening again. No windows were partially open and can't see any wet patches to show where it may of come from?? 
so cant get the spanners out at the mo