Hey - I highly recommend this product - hand crafted in the Ukraine. We have them on a RadCity and a RadWagon. It fits great on the stem of both and provides easy access to a water bottle, cell phone, etc. Support craftsman in Ukraine.
https://www.etsy.com/listing/605677183/feeder-kasybag-pocket-pack-l-for?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=bike+feed+bag&ref=sr_gallery-1-11&organic_search_click=1