The wINPlasLab is a non-thermal plasma system designed for the treatment of liquids using transient spark discharges. It accommodates liquid volumes up to 1 litre per batch and is suitable for applications such as biological decontamination and liquid treatment. The system features adjustable electrode positioning relative to the liquid surface and includes an integrated magnetic stirrer for consistent sample mixing. It is capable of treating various liquids with different conductivities and can effectively address bacteria present in solutions.