Exactly what I wanted—feather-light, truly leakproof, and it keeps drinks hot for hours. Filled near-boiling at 05:00; by noon indoors it was still ~60–65 °C ☕🔥. The 480 ml size is a sweet spot and fits car cup holders; the one-touch lock feels backpack-safe. Only wish: fewer stickers on the cup (or gentler adhesive). Lime Green looks awesome. My daily carry mug—highly recommended! 😊