[Saves Your Stanley Tumbler ]Isn't the lid airtight??? Lose if you fall? ? ? it didn't keep your water cold?? Can't put it in the work bag?? Our stanley cup accessories spill stopper changes the game,100% leakproof. Only for Stanley 1.0 Cup Tumbler 40oz/ 30oz | [360° Anti-leak Design] Improved transverse cutting round leak proof plug and square spill stopper,effectively seal, you can twirl your tumbler by360 degree,no spills,drink water easily. Bonus :The straw tip cover cap can stops debris and dust | [Securely Fix ] Well designed and thick silicone construction to prevent sliding and droping to keep it in place better when you shake your cup. Package Include : 1 straw cover cap,1 square spill stopper and 1 round lid leak stopper | [Free Your Hands]Our lid spill stopper is your stanley cup's perfect complement. No spills or leaks would happened in your bag!!! Carrying your tumbler cup with you go anywhere else you want to go while keeping your hands free. Aslo a thoughtful gift for your lovely firends,family | [Eco-firendly Premium Silicone ] Much better than cheap PVC material, our stanley cup spill proof stopper set are made from food-grade silicone,eco-friendly,BPA free,odorless,durable,not absorb smell,soft. Resists rust for long-term use. Easy to Clean and Install,dishwasher safe | [ Risk Free Purchase ] In order to guarantee your shopping experience, you need to check the version of your Stanley Cup before purchasing.If you encounter any problems when using the silicone spill proof stopper, please contact us by E-mail in time, We will help you solve your problems as soon as possible,UNTIL THE CUSTOMER IS SATISFIED .