BIGGDESIGN STAINLESS STEEL WATER BOTTLE- Biggdesign water bottle is made from stainless-steel. The stainless-steel outer and interior wall is BPA-free. This highest quality construction preserves the freshness and taste of your drinks throughout the day. You don't get any metallic flavors. It doesn't absorb strong flavors or aromas, keeps your drinks tasting fresh. , , WATER BOTTLE WITH STRAW- This is a water bottle with built-in straw because straw lids are the most ergonomic option for easily sipping a drink without tilting your head back. The sipping version is great for when you don't have the desire or ability to play with the top lid. You can open it with one hand, and drink without splashing water all over yourself therefore it can adapt to almost any situation, whether you're sitting at a desk, in the car, travelling, or at the gym. , , LEAK PROOF- The lock feature works well, it doesn't accidentally pop open and spill contents when this insulated water bottle is in your pack. It is spillproof and leakproof with normal use and vigorous shaking or twisting.