Manchester United Boxing Day?

My Wife & I have been "very" lucky enough to be given Xmas present tickets to the Man Utd v Sunderland match on Boxing Day. Our tickets are STH229 Row 30. Can anyone please comment on the view we will actually be able to enjoy, We have never been to a Football Match before, will we able to take a flask of hot drink with us into the ground? - many thanks Terry & Elizabeth