Product Compatibility - Our tumbler adapter designed for stanley 40oz / 64oz quencher H2.0 flowState tumblers, ensure a perfect fit with the adapter for stanley cup. Use your flavor cartridges with your tumbler. Warm Reminder : The Flavor Cartridges and Cups are not included in the sales product set. The picture shows only the effect of using the tumbler adapter Product Material - This tumbler adapter is made of polypropylene plastic that does not contain BPA. Use food grade silicone structure to ensure that harmful chemicals do not seep into the beverage, making it reusable and reducing waste Leak Proof Design - The sealing ring can prevent leakage and overflow, keeping your beverage fresh and controllable without causing any trouble. The threads of the lid fit perfectly with the Stanley cup Easy To Use & Clean - Simply attach the adapter to your Stanley 40oz / 64oz tumbler cup, insert the flavor cartridge, and enjoy your customized drink in seconds. We also give you a multi-functional cup lid brush, which is very convenient for cleaning our adapter and Stanley's cup lid. Easy to install and convenient to clean Perfect After-Sales Service - If you have any questions about our tumbler adapter, please contact us and I will solve them for you as soon as possible. Please note: this adapter is only compatible with the 40oz / 64oz Stanley cup. Cup and lid are not included. Any mention of the brand is for compatibility purposes only Tumbler Adapter for Stanley to Flavor Cartridge, Fits 40oz / 64oz Stanley Quencher H2.0 FlowState Tumblers, Leak Proof Tumbler Lid Adapter, Cup Converter Accessories BPA Free