1. Nothing added
Every product I tried had something added. BPA-free plastic still had BPS. Silicone had siloxanes. Bamboo had formaldehyde glue. Amazon wood was coated in industrial lacquer.
Small leaf acacia is naturally oily. It is antibacterial, antifungal, and water-repelling all at once. It does not need coatings. It does not need chemicals. It is just... wood.