Hello! Anyone have recommendations for a good whole house water filtration system? We were going to do an RO system but found out your water bill triples in cost with it

Hello all! We have a teething toddler who is getting her top molars in. We have been using Earthly teething drops and the camilia drops which have worked great but she is seemingly need more for her discomfort. We try to give her something cool to chew on but she never wants to chew on anything besides her fingers. Any ideas would be appreciated!