I bought a "Bears Ears" pack from Nunatak (nunatakusa.com) and I'm impressed with it.? It's reasonably light -- 27 oz but can be stripped to 25 oz.??
It's designed to carry a bear can on the OUTSIDE.? It has 35 liters of space in the main pack which is gigantic.? It also has a huge wrap-around pocket.? The bottle holder is the best I've seen -- and I've tried plenty!? You don't need to be a contortionist to get the bottle out.? It is rated for 35 pounds.? It is sturdy - unlike many ultralight packs.

I put my Bearikade Expedition on it, loaded it up with some weight and did a 5 mile hike and it was GREAT!? My main concern was that the can would dig into my back or flop around.? Not at all.? It was held very solidly about 4" away from my back.

I absolutely hate trying to cram gear into a rectangular pack around a huge cylindrical bear can taking up most of the pack space.?
Another useful application is putting waterproof food inside the pack and turning the bearcan into your "sanctum santorum" (cf: Colin Fletcher) while hiking -- i.e. all your down, electronics, etc.

$330
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Byron Nevins
Lead Moderator of JMT at groups.io