Premium Food-Grade Material – Crafted from 100% BPA-free, high-quality Tritan Co-Polyester plastic, ensuring safe drinking with no chemical taste or odors. Freezer Safe & Space-Efficient Design – Square shape occupies less space, making it perfect for fridge storage, while the sleek design enhances any kitchen or fridge layout. Leak-Proof & Reusable – Features a secure, leak-proof cap, making these bottles ideal for on-the-go use, at home, or in the gym. Eco-friendly and built to last. 31 CM long Silicone Cleaning Brush – Soft, long-handle silicone brush for effortless cleaning of narrow bottles, jars, and containers. Gentle on surfaces, durable, and long-lasting. Read Less