Wedding emergency kits can be purchased from retailers. Here is the link to the kit below on Amazon.com.
If you would like to create your own wedding emergency kit, here are a few essentials to include.
tampons and pads
hair spray, brush, bobby pins, hair bands
nail polish and remover
toothbrush and toothpaste
antibacterial hand sanitizer
small sewing kit
directions to reception with copies
phone numbers of all service personnel
something to drink (bottled water, juice)
straws (avoid lipstick smudge)