In an attempt to save money, I tried other solutions for RGP lenses, but those solutions have come and gone as nothing can compare to Boston solutions. When Costco carried this product in the warehouse, this was the best place to purchase this item. I am now having to purchase it elsewhere but would prefer to give my money to Costco as their prices are more reasonable. I did not know it was available online but will probably buy from them once my current stock is depleted. It would be nice to see it in the warehouse again.