How to More Easily Open/Close the Lids: To ensure leak-proof performance, our lid is tightly sealed which may make it harder to remove or install. lf you face this issue, try two solutions: First, check if the sealing ring is properly positioned and adjust it if needed. Second, slide the tab while removing or installing to balance the internal andexternal air pressure.

Double-Wall Vacuum Insulation: RAYMYLO Coffee Mug keep your drinks icy-cold for 9 hours and cozy hot for 3 hours with advanced Double-wall design! Perfect for hot summer days or long work hours, this insulated coffee mug with handle ensures your drink stays refreshingly cold or deliciously hot when you need it most.

100% Leak-Proof Slider Lid: Exclusive slider lid glides smoothly,settled and locks securely with an airtight seal, staying 100% leak-free even when inverted. You’ll love the effortless sliding action that makes sipping on the go a breeze. Stainless steel coffee mug’s wide-mouth design with soft straws lets you sip comfortably, whether you’re using a straw or drinking straight from the cup!

Pure Coffee,Zero Metallic Aftertaste Guaranteed: RAYMYLO coffee mug crafted from 304 food-grade stainless steel, this reusable coffee cup with lid ensures zero metallic aftertaste. Enjoy your coffee, tea, or cold brew with uncompromised flavor ! Perfect for coffee lovers and tea enthusiasts alike.

Effortless Cleaning: The reusable coffee mug features a detachable lid that takes off easily. Its user-friendly design means disassembly and reassembly are a breeze, allows you scrub away coffee stains from every nook and cranny. The included cup brush reaches deep into the stainless-steel interior, leaving no stubborn residue behind. Keep your coffee mug spotless with ease!

Lifetime Warranty & 24/7 Support: We’ve got your back! RAYMYLO stainless steel water bottles sell extremely well on Amazon and are loved by consumers worldwide! Every RAYMYLO insulated coffee mug comes with a lifetime warranty and dedicated customer support. If you have any questions after receiving the product, please feel free to contact us.