Tinks69 has been around forever and I had used it years ago. Since then there are other lures such as Golden Estrus and Code Blue which have alot more $ rapped up into the manufacturing of them. Tinks comes in a dark bottle so that you cannot tell how old the urine is. If the urine is dark in color or has stuff floating inside it is not fresh and has not been handled to the standard that Golden E. or Code Blue has. Quality scents come in glass bottles that are tinted brown but not so dark that you can't see the product.