I use to hold a Gregory Jade 62L pack (a lot of hassle-free pouches/pockets that temped me to “things them”; carrying the tiny extras to assuage my trail fears. (Acquired at REI and was coached by a skilled backpacking personnel.) Other packs just make use of a sample of offset https://trails-near-me79999.onesmablog.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-hiking-water-bottle-74902224