Premium Borosilicate Glass Construction: Crafted from durable borosilicate glass, this water bottle is BPA-free, lead-free, and resistant to thermal shock, ensuring safe drinking without plastic taste. The high-quality glossy finish adds elegance while being dishwasher safe for easy cleaning. Leak-Proof & Non-Slip Design: Features a secure leak-proof lid and silicone non-slip sleeve (included) to prevent drops and spills. Perfect for active use in the car, gym, or hiking no more wet bags or slippery hands! Ideal 21oz Capacity for Daily Use: Holds 21oz of water the perfect size for office hydration, workouts, and travel. Fits most cup holders and backpacks while reducing refill needs. Multi-Scene Versatility: Designed for work, travel, fitness, and outdoor adventures.