@Seth157
I would say not necessary, unless you are trying to sell a particular type of experience like @Mark116 describes. I have found, in terms of kitchen equipment for guests, the most important thing is having plenty of plates, cutlery, glasses etc. It's amazing how people can freak out if you don't put the dishwasher on as soon as it gets 1/4 full, but if they have enough stuff to use, they get a bit calmer about it!
I don't provide bottled water either. I have some in the fridge which I offer to guests if they would like a glass of water when they arrive as some people are funny about drinking tap water. After that, it's up to them. They can buy bottled water if they prefer it but the tap water is perfectly safe here so I'd personally rather not add to the mountain of single use plastic. I do have a water filter on my tap, but stopped even telling guests about it because 99% of the time, they do not remember.