Water Pick attachment as drug free allergy treatment?

About ten years ago, I saw a short news segment about an attatchment for a Water Pick machine that would allow you to irrigate your sinuses. It was supposedly a drug free treatment for seasonal allergies.

Does this thing really exist? I asked several pharmacists over the years and nobody knows what I'm talking about.

If so, do they work well enough to give up antihystimines?

: http://alcoholdrugstreatment.info/water-pick-attachment-as-drug-free-allergy-treatment