NUK learner and sippy cups commonly come in sizes ranging from about 5 fl oz up to 10 fl oz. The most frequently available options are 5 oz, 8 oz, and 10 oz.
NUK bottles are typically suitable from newborn onward. Learner and sippy cups are generally recommended starting around 6 months and can be appropriate through 12 months and beyond, depending on the specific style and the child’s readiness.
NUK Smooth Flow bottles are offered with Level 1 (slow flow) and Level 2 (medium flow) nipples. Some newborn sets may also include faster-flow nipples for older infants.
NUK products include features to ease the bottle-to-cup transition such as soft, spill‑proof spouts, removable easy‑grip handles, two‑piece transition kits that convert bottles into learner cups, flexible straws, and air vents or flow‑control valves to reduce spills and swallowed air.