Satchel if I'm a player to hold the few books I need.
If I'm DM I use a big plastic crate or a rubber beach bag thing.
There are cup holder attachments you can get, I also have seen a cup holder specifically for the Buddy on Amazon.
Here it is: GEN-U-BIN Storage System for Buddy (Black Color) https://www.amazon.com/dp/B005M2N7HE/ref=cm_sw_r_cp_apa_i_VV5eDb0HEB8BM
It’s not a perfect fit but I got these for organization
Sammy & Lou Felt Diaper Caddy... https://www.amazon.com/dp/B073FZV93X?ref=ppx_pop_mob_ap_share
Purse Organizer Insert with Lots... https://www.amazon.com/dp/B07H2545QP?ref=ppx_pop_mob_ap_share
A purse organizer I think is definitely the way to go for the console!
You can get bigger ones off Amazon, too. They’re not as elegant as the IKEA boxes, but they do in a pinch and are the same size. We have both styles mixed and matched because even though I live like 20 minutes from an IKEA, it’s still a pain in the ass to plan on going to sometimes.
EZOWare Set of 4 Foldable Fabric Basket Bin, Collapsible Storage Cube Boxes for Nursery Toys (13 x 15 x 13 inches) (Black) https://www.amazon.com/dp/B074KRRZ35/ref=cm_sw_r_cp_api_i_4WGuDbRW9QNGH
If you're cost conscious and crafty, this is the Moses Basket I have on my registry. For some reason, Amazon doesn't like to stock the plain basket. This is marketed as a laundry basket but it's the same style and build as the blank moses basket. Read the reviews. Do not buy Badger brand, the basket runs a lot smaller.