FEATURES: No Plastic Components...No Safety Concerns! Baby Grows...Bottle Evolves™: Easily converts from a straw bottle to a sippy cup or infant bottle by simply swapping the Silicone Straw for a Pura XL Sipper™ Spout or Natural Vent Nipple™ Crafted from safe, anti-bacterial, #304 stainless steel Pura Silicone Straw™ crafted from 100% medical grade silicone BPA-free & EA-free and will not leach toxins like plastic straws, bottles, or collars Internal volume markings make measuring your child's milk or other beverage a snap. Each ounce is marked and can be seen by glancing inside the bottle. Silicone Travel Cap included. volume total 275ml Keeps liquids warm or cool for up to 6 hours Uses the same stainless steel collar as the original Kiki so like all products in the Kiki line, the insulated versions are compatible with all Pura silicone nipples, spouts, sealing disks, straw modules, etc. Include: a straw and a cap