Straw lid: As one of the most popular lids, our straw cap has a larger suction nozzle and straw, providing you with a larger flow of water without any noise. The honeycomb structure inside the lid does a great job in keeping your baverage hot or cold for a long time. This is really a must have for sport enthusiasts no mater you are jogging, runing or hiking...<br> Bite lid: With unique opening and closing valve, you just need to bite and pull the mouthpiece and then intake water from the spout, leave the ice cubes inside your hydro flask bottle.<br> Twist lid: Some times you do need a solid lid based on events to prevent your drink from spilling, this lid is a good choice. We added a hook on the top so that you can easily carry your hydro flask on the go. Plus, it's really hard to break this sturdy lid.<br> Steel cap: High strength stainless steel structure for better sealing and controlling drink temperature, the large handle allows you to grab your hydro flask well. It's a Hard, sturdy and durable lid, so if you're constantly droping your hydrofalsk, our steel cap is a good choice.<br> Bamboo cover: The top of the steel structure is embedded with a natural bamboo piece, which is our innovation to the appearance. The design retains the sealing, durability and large handle of the steel cover, while adding a fashionable log process element, making your water cup charming.