The Fragrance Sticks in Animal Crossing are based on reed diffusers, a popular home fragrance product that slowly releases scent without heat or electricity. Wooden reeds absorb scented oil from a container and gently disperse the fragrance into the air through evaporation. Reed diffusers became especially popular in the late 20th and early 21st centuries as a low-maintenance, decorative alternative to candles, often used to add a subtle scent and calm atmosphere to living spaces.
These reed diffusers from Pristine are a close replica of the tinted round bottles you see in Animal Crossing. If you prefer something made in the USA, try a candle maker like Lorenzen Candle Co or Soy and Sass.