No spill spout featuring our cross cut design eliminates spills while extra soft, medical grade silicone spout provides easier transition from baby bottle to sippy cups. Perfect for 9 to 36 months of age. The award-winning Thinkbaby sippy cup converts to the Thinkster straw bottle through purchase of the conversion kit. Easy to clean and dishwasher safe. Bottles made from polypropylene and spout from extra, soft medical grade silicone. Available in orange and pink.