Never drink a warm beer again. The one and only in-bottle drink-through beer chiller is here to save the day. Simply pop into the freezer for 45 minutes, take a swig of beer to make room for the Chillsner, insert in bottle, pressing firmly to create a tight seal, and enjoy! Some beers may foam, so use caution on first use. Works for any standard beer bottle. Dishwasher safe and reusable.