This is a two pack of straw adapters for your 64oz Gatorade Gx Jug. This adapter has a full fit of the pour spout as well as a retaining lip to prevent movement of the adapter while in use or when changing straws. Additionally, the straw hole has a four-tab retention design, to prevent movement of the straw when installed, providing a more secure user experience. To install, simply press the adapter firmly into place from the top of the lid in the pour spout opening until it pops into place. To remove, press on the adapter firmly from the bottom side. Though you can pry from the top to remove the adapter, doing so repeatedly can lead to premature failure of the adapter at the inside corner.