Though very sturdy, this square carboy is not designed for significant positive or negative pressures.Temperature Limits – -30 to 60°C (-22 to 140°F) Special Features – The 3 gallon capacity yields fifteen 750 ml bottles of wine and is ideal for ice wine kits and for making good use of the unpredictable volumes of juice created from whole fruits. The square shape makes efficient use of space in a refrigerator.