I want to say that's ok. It's human nature for whatever reason. I'm all for anyone giving zero-waste habits a go...for any reason. Each straw skipped helps + any zero-waste habit can snowball into more action + awareness. But I would like to caution against zero-waste involving a shopping list...because more often than not it will simply remain a way of consuming rather than a way of thinking.
This problem is demonstrated by the cashier checking me + my toilet paper out at the grocery store telling me that she is trying that internet toilet paper that she can't remember the name of. I supply the name + hope she realizes the irony of this whole situation. She could just walk down the aisle of the store she works in to buy paper-wrapped, recycled, toilet paper rather than having a huge box shipped across the country just for her. Ugh.
Zero-waste isn't a collection of pretty wood handled brushes or tote bag full of stuff to lug around. It's a way of thinking that inspires a thoughtful way of life.