The researchers say the next phase is to scale - up for use in water treatment plants. (sciencedaily.com)
Since they're plastic, they won't become damaged when used in the water and you won't have to worry about rust becoming an issue, either. (abckidsinc.com)
Additionally, when you aren't using it in water, you can use it to carry your phone, keys, etc.. (naturallifemom.com)