I purchased two packages of Sani Sticks. I used them according to directions for four months and my kitchen drains clogged. I hired a plumber to snake the drains and found that the Sani Sticks were the problem as they were a messy glob. Expensive lesson. I would NEVER RECOMMEND this product to anyone! I still have a partially used package but do not have my order number.
Bottom Line: No, I would not recommend this to a friend