Keep in mind I rent a two bedroom house and am not there with my guests - so this is what I leave:
I provide those giant bottles of Tressemme shampoo and conditioner.
No bar soaps as I can’t imagine someone using a bar of soap for a couple of days and then just tossing it. Plus, I don’t get to hotels so don’t have mini ones. I provide shower gel: not generic brand but not fancy either - Caress, St. Ives, Axe for him/her, etc.
I put the above in a container and leave underneath cabinet. I let guests know before they pack that they can help themselves and all bottles are shared by other guests.
Coffee: I purchase a box of S&D regular packets from Sam’s. Each packet makes a pot of coffee. I provide a drip coffee maker. For creamers I offer the mini Moo Moo’s that can sit out at room temperature. I fill a sugar dispenser - no packets. There is an old coffee mate powder creamer. And an old Folgers decaf canister from so so long ago. I guess I should throw it out…lol. I don’t think I will continue to offer decaf.
Next to the coffee I have a canister filled with 8 name brand granola bars purchased from the discount grocery store. So they may be expired but not long after the “best sell by” date. Hey but they’re free! I eat them too. Good enough for me then good enough for my guests. It may be fruit bars the next time. It’s whatever deal I can snag.
There is also a bin of instant oatmeal variety and cheese grits. This was also purchased from the discount grocery and hardly anyone touches it.
I am going to order some individual teas too. I am going to upgrade from my one box of black tea bags that are not individually wrapped.
But do what works for you. If you drink generic coffee from a canister then you may want to only provide a shared canister for guests. I did that for a long time. Some people think it’s gross but oh well…it’s complimentary. And if you can use it yourself then it won’t go to waste.