ice trap retains ice or beer foam made of break-resistant polycarbonate for ultimate durability specially contoured lip design allows for easy pouring with ice from front or either side without splashing ergonomic handle provides a sure comfortable grip thumb grip aids in control of pitcher while pouring thinner wall provides optimum strength and durability; also reduces wait staff's wrist stress Polycarbonate (PC) is resistant to staining, breaking and chipping Polycarbonate is sometimes weakened by repeated cycles in a dishwasher and stress cracks are one of the indicators of this. Polycarbonate may be considered dishwasher safe but damage resulting from washing may vary depending on temperature and location in dishwasher.