Premium Quality Glass Bottles: Crafted of thick clear glass, lead-free and BPA free, sturdy and reusable for safe long-term use. Airtight Stainless Steel Lids: Each bottle comes with a rust-resistant stainless steel lid, lined with silicone O-ring for leak-proof and airtight seal. Convenient Wide-Mouth Design: Wide opening allows easy filling without funnel, easy drinking and cleaning, perfect for everyday use. Multiple Uses: Great for storing distilled water, soda, milk, smoothies, coffee, juice, kombucha, kefir, sauce, syrup and more. Perfect for travel and on-the-go hydration. Complete Set: Package includes 12 empty glass water bottles and 1 sponge brush for convenient storage and cleaning.