PREMIUM BOROSILICATE GLASS: Made from high quality heat resistant glass for exceptional durability and clarity. Suitable for freezer, oven, microwave, air fryer and dishwasher use — built to handle daily cooking and storage with ease. 20°C to 400°C AIRTIGHT & LEAKPROOF LOCKING LID: Features LocknLock’s trusted 4 side locking system with a strong silicone seal for superior leak protection. Keeps meals fresher for longer while preventing spills in bags, fridges, or lunchboxes. DURABLE, ODOUR RESISTANT & BPA FREE: Lids are BPA free, and the glass containers resist scratches, stains, and odours. Ideal for healthy storage with maximum peace of mind. THERMAL SHOCK RESISTANT GLASS: Engineered to withstand up to 200°C thermal shock, allowing use from freezer to oven. Perfect for batch cooking, reheating, meal prep, and everyday versatility. HYGIENIC & EASY TO CLEAN: The silicone seal can be removed effortlessly to prevent trapped food and odours. Glass does not stain or retain smells, making it ideal for sauces, curries, and long term fridge storage.