Complex sentence: The problem with an icebox was that the cabinet housing it was large, but the actual refrigerated space was quite small, so a clever and innovative solution was invented, the "cold pantry", sometimes called a "California cooler".
Split into simpler sentences: The problem with an icebox was that the cabinet housing it was large, but the actual refrigerated space was quite small. So a clever and innovative solution was invented, the "cold pantry", sometimes called a "California cooler".