Just Natural Glass 350ml Travel Cups with anti-slip silicone sleeve are non-stick, waterproof, heat-resistant and reusable. Free from plastic, BPA, and BPS – wave goodbye to littering the planet. Available in three Pantone colours (grey, green, and blue), borosilicate glass is lighter than humdrum ordinary glass. There’s a rather ingenious splash-proof lid, too. Be kind to our planet: choose Just Natural. Just don’t forget it at home.