Since the weather is getting nice I got to thinking about a simple (and light) survival kit that can be stashed in the daypack. Everything is housed in a Sea to Summit dry bag and the total weight is exactly 1.0 lbs. Here's what I came up with:
AMK Heatsheet Bivvy (nested inside mug)
BiC Mini lighter
Fox 40 whistle
Frontier filter straw
LMF Scout firesteel
MP1 water purification tabs
REI Stormproof matches w/striker strip
Rescue Flash signal mirror
Silva Type III compass
Snow Peak Ti 300 mug
Spare CR2032 batteries (x2)
WetFire tinder (x2)
Looking at the contents I'm trying to keep it limited to providing water, shelter/warmth, and signaling. Our daytime temps have been in the 100s (F) with our nighttime temps dropping to the 40s-50s (F). Between dehydration and exposure those are probably the two biggest threats right now.
Adding to this at least 2L+ of water, some snacks, an extra pair of synthetic socks, jacket or fleece, hat, GPS, map(s), modified AMK ultralight FAK, and a SAK Farmer everything comes in at about 8 lbs. for a dayhike.
Any suggestions or comments welcome!