Air-Lock Stopper: Oak age your beer! This air-lock stopper allows gasses to escape while maintaining a sealed environment inside your Whiskey Lab. (Please note that beer will lose its carbonation and will require re-carbonation. Home water carbonators work great for re-carbonation.)
Bulb: In case you need a replacement.
Notebook: If you want to take extra notes or lost yours.
Sticker: Because stickers are fun!