Best man emergency kit

A friend of ours is getting married & my boyfriend is the best man. He put together an “emergency kit” that so far consists of:

Mints/gum, Water bottle, Cigar and matches, Energy bar, Cologne (neutral scent), Pen and paper, Tissues, Spare tie, Comb, Eye drops, Tide pen, Deodorant & Small sewing kit

Is there anything else we should add that you found to be useful or something you wish you had?