Yep, I love thrift stores. Found a Nalgene bottle the other day. Picked up a daily pill case that I can use to store spices and other small items if I need. Also, don't forget those dollar stores. Plenty of good items in there from cheapo, super light bowls to Chicken of the Sea tuna and salmon packets for a buck.
I'm not too proud to check out thrift stores. People here in AK often bring in high end gear to the thrift store to get rid of when they move out of state. You can snag some sweet stuff but you have to get it quick before the craiglisters snatch it and resale it.