Carrying a water bottle around is great way to save money, especially if you’re out and about all day and get thirsty. However, it can easy to lose your water bottle cap if you carry around a bottle like this:

All you need to keep track of the lid is a simple retention strap that you can make out of paracord (found easily online). To do this project, you’ll need to know how to tie a double fisherman’s knot and a bowline, so check out the tutorials to help you out if you need!

Source: ITS Tactical via Lifehacker

Photo credit: lululemon athletica