This is a new and useful improvement to liquid and dry product containers, modifying the flow rate of delivery. The user sandwiches the invention between the cap and existing vessel, which reduces the delivery rate of the product from the container when poured by the user. The invention conserves product quantity and reduces loss in an accidental spill. The invention is designed to fit a variety of containers. The invention is designed to dispense different products at desired flow rates. The invention is designed to be modified for specific applications. The invention can be reused after the vessel is emptied, thus conserving production material. The improvement is obvious because it benefits the consumer, not the manufacturers.