Coffee: my pre work cup-a-joe I bring my own cup. Knotted gave me one that's ... made from corn. Looks like a regular mug yet quite the conversation piece in the coffee line
"ooh, you brought your own cup"
"yep, they give .10 off here and it's made from corn"
" nice"

Bags: BMOB mostly cloth, I have quite the collection from Bike to Work Day. Trader Joes puts you in a drawing for a gift card (I've never won), Safeway gives you $ off etc. Besides the green thing I just find them easier to carry.

Plastic bags: If they give them, I take them, I don't quibble or jump up and down. Sometimes talk about why I bring my own with clerks, store owners etc. But if they give me plastic bags that's ok. I have to admit that on dog walks I pick up plastic bags we encounter on the ground, not if they are messy but if they are clean we pick them up. All these bags get used for mutt poop bags. We need 'em, Mae gets lots of walks.

Still it's a lot of bags. Its no trouble to drop the rest of the bags off on the way into the store at the plastic bag recycling bin we have at most stores here.