Made from food-grade, material, ensuring safety and compliance with high-quality standards. Compact and cute design makes the stopper easy to clean and replace, suitable for repeated use. Equipped with silicone rings for strong sealing, tested for sturdiness and serviceability, ensuring no leaks or peculiar smells. Leak- stainless steel lid allows for worry-free transport in backpacks, with a twist-and-pour design for easy beverage access. Not recommended for dishwasher or microwave use, ensuring and maintaining quality over time.