Hello @Shurhonda-Shuyvette0 ,
Upselling on Airbnb is not easy, and you risk your listing for just a few dollars. A guest might take a water bottle and then refuse to pay, saying they never took it, and you could end up with a 1-star review that ruins your listing. That’s my opinion. You are welcome to try, but never argue with a guest if they say they didn’t take it. If it works well and becomes a significant source of income, please let us know. I would love to try it too.