ever AgainMake Muddy Cup of Coffee: Our coffee press features a 4-stage filtration system with 2 stainless steel screens, spring base and lid filters, all of which are ground-proofWon't Stain Hot Coffee and Broken Glass: Made from high-quality borosilicate glass, our French coffee presses can withstand boiling water without warping or cracking. The last French press you will ever buy: Our large French press is constructed with 304-grade stainless steel for the bottle body, filter, handle, and top cover; rust-resistant, corrosion-resistant, and built to last. Safe for Beginners and Experts: The materials in our French Press exceed U.S.F.D.A. and European Commission food safety standards; while the included brewing manual helps both professionals and novices.