This is a bag that serves both purposes (saddle or handlebar): the straps are spaced to allow you to hang it on either end of your bike.
It’s big enough for a mini-pump, rain shell, tools, tubes, a banana, a wallet, and even a camera. Access is via a full-length zipper.
It has a third strap that can be attached to your stem or seat post to limit swaying.
A light can be clipped to the name strap.
Dims: 30cm x 11 cm.