unique wedding favor ideas

Anyone who can suggest of unique wedding favor ideas? My friend is getting hitched in six months and I was given the honor to come up with nice wedding ideas and suggestions for their wedding. The couple is actually adventurous having met in one trekking activity a few years ago. I heard about The Knot Wedding Shop and how it can cater to my very busy schedule. I am so keen in checking out their favors that can be personalized with the couple's name and their wedding date. With their 24 hour accessibility and quick turnaround delivery for last minute order, I guess this is the best wedding site to be. Care to comment?