It cost nothing to collect and store a constant supply of rainwater to use (other than the initial cost of the water butt).
It is absolutely worth having a water butt!
Having your own water butt will allow you to collect and store rainwater to use on your plants and around your garden.
Water butts help us reduce our carbon footprint by using less tap water which requires a tremendous amount of energy to treat. Furthermore, it can help you save money on your water bill.
It’s worth noting that rainwater is much better for your garden than tap water, which contains chemicals such as chlorine and fluoride.