Our favorite made in Colorado bag to attach to just about anything. We used to these on our stroller, and now bikes, kids' bikes, and cargo hoopties/rails.
- 4 velcro straps that can attach your bag to the front of handlebars, between the stem and handlebar, to strollers, etc
- Slap closed function to keep things secure while riding (I put my phone and snacks in there)
- A bungee to secure your keys to