There are four main types of sippy cups: Hard spout, soft spout, straw and flat lid. We’ve featured each of the four types on our list of the best sippy cups, but it can be difficult to decide which is best for your child. Soft spouts and straws are popular choices, as they more closely resemble nipples and are easier for tots to learn how to drink from. “Straws are better for oral motor development, but most babies can't figure out how to use them before they are 9 to 12 months old,” says Dr. Crosby.
Besides straw and spout, many experts also recommend flat lid or spoutless cups. “I always suggest a spoutless one as the first option,” says Dr. Kelman.