The First Years Spill-Proof Cups, 7 Oz 6 Pack spill proof cup. Ideal for drinks on the go. These training cups are durable enough to use and reuse yet affordable enough to treat as disposable. The easy sip spout lids are spill proof for easy traveling and are valve free for easy cleaning. Dishwasher safe. For babies 6 months and up. Assorted colors.