FSGLI provides up to a maximum of $100,000 of insurance coverage for spouses, not to exceed the amount of SGLI for the insured member, and $10,000 for dependent children With FSGLI, life insurance for a military spouse is issued in increments of $10,000, at a monthly cost ranging from $.55 to $5.20 per increment.
The sweet spot for most hiking and multisport daypacks is 30 liters (around 1,830 cubic inches). That's enough capacity to hold the Ten Essentials (for the list, see the REI Expert Advice article, the Ten Essentials) plus some extras. Sizes vary by intended use.
Personally, I kept my hiking hydration system simple: 4 Nalgene bottles in the 4 bottle pouches on the outside of my Kelty backpack. With a bit of practice, I could reach back on either side to the lower bottle pouch (flexible mesh) and pull out a bottle for a quick drink while hiking.