High Borosilicate Glass Material:The glass shaker bottle made from high borosilicate glass that is safe and lead-free for cold and hot drinks.0.15in/3.8mm thick glass is more durable.It is better than 0.11in/0.28mm thick glass bottle. Portable Design: With a 12 oz capacity, this reusable glass water bottle is compact and portable for travel, office, home, and more. Wide Mouth Design: The wide mouth reusable sports nutrition bottle allows easy cleaning and adding fruits and other items. Leakproof Lid: Silicone ring inside the lid keeps contents upright and leakproof.Water proof so easy to put the small glass water bottle in to your bag. Microwave and Dishwasher Safe: The small mixer bottle with lid can be used in the microwave and dishwasher, but lid should be washed by hand.