If you need to carry with you during your cycling trip:
This sachet will be a great choice!
Brelok - opener with logo is a practical gadget that you can always have on hand! It's metal, so it'll hold up a lot. It won't break like other plastic counterparts. This is something that will be useful with every key and every trip
You can easily attach the sachet with Velcro to the frame. The stability of the mount will ensure the safety of things even in the event of fast driving on uneven terrain.
The sachet is made of codura material - it ensures that your belongings packed inside are safe even during rainfall.