Along the top is my reflective jacket (with a button for the Conestoga LRT stop), the bike bag itself, an extra 1 litre waterbottle (that's too large to fit in the bottle cages), and a tin with crackers that I just finished eating (a little stale, they've been in there since summer). Next row has a plastic bag for putting over the seat before it rains (but usually after it rains), a couple of bungie cords, a tire pump, a blue bag with my lights & stuff (wall charger, USB battery bank with a USB cable on top, and a small pouch to hang the battery bank from the handlebars to charge the light while in use), spare batteries, and a spare (incandescant) front light. There's a camouflage bandana, either for hair control (I'm quite shaggy at the moment) or to wipe the bike grease off my fingers, below that a neoprene knee brace, the other white Christophe pantleg strap with a yellow Christophe pantleg strap (I lost the other yellow one on the last WRCycle ride, it was holding my bike seat together), a hoodie in a white plastic bag to keep the water out (but mostly in), a pair of leather gloves, two bottles of sunscreen, the handlebar mount for my cell phone, and above that a box with a spare innertube and some mounting rings and bits for lights and brackets I no longer own. Missing are the front and back light (currently in my helmet hanging in the hallway), my odometer, and another plastic bag full of more plastic bags. It all weighs about 5kg or 11 lbs, maybe more.
https://mastodon.sdf.org/system/media_attachments/files/113/808/349/087/701/701/original/db4448a7ad3327d6.jpg