This is pretty cool. PACElid is a replacement lid to add a little storage to wide-mouth drinking bottles.
PACElid is atertight and durable, with a lanyard loop point located on the side allowing you to secure it to the bottle with 550 cord.
These little storage lids can hold your keys and a snack or small first aid or survival kit.
PACElid fits Nalgene, Klean Kanteen, and Hydroflask bottles. They come in black or green and retail for $20 at Optactical.com.