【High quality material】The magnetic lid was made of high quality plastic material which will be safer without BPA. The lid is upscale with premium transparent look that you can check the content of water in the cup without opening the lid. 【Spill Proof and Heat Insulation】The rubber ring of the magnetic lids will firmly fit the bottle and will not let the liquid in the cup leak out. The thick cover helps us insulate the hot water well and makes us safer to use. 【Easy to clean】It's easy to remove the magnetic slider and rinse. Or put them in the dishwasher for easy and simple cleaning. But avoid putting them in the microwave. 【Four colors of Sliders Replacement】Offering extra 4 pieces magnetic sliders, you can change different slider to make simple fashion matching. Saving money and time, the sliders will compatible with your tumbler lids well. 【Strong magnetic slider】With a powerful built-in magnet, the slider can be easily opened or closed, which keeps the aroma and taste of our drinks from spilling out.