Hip packs are actually a hot trend right now in the mountain biking world, so there are a ton of well designed cycling-specific options out there. EVOC, Dakine, Osprey, Camelbak are a few of the more well known brands that all offer cycling-oriented hip packs.
For on bike options, a bar bag does not effect the handling unless there is a bunch of weight in it (a lot more than a couple sandwiches). Sounds like you are just looking at a small one, anyway.
Also might look at a top tube/stem bag.
Last edited by Kapusta; 03-18-24 at 10:27 AM.