Listings show capacities of 5 fl oz, 8 fl oz, and 10 fl oz.
Many models include easy-grip, anti-slip handles that are removable as the baby grows; several listings explicitly note included handles to make grasping easier.
Several listings mention on-the-go features such as carrying clips and protective caps to keep the spout clean; some product titles also describe the cups as portable drinkware.
The listings identify the cups as plastic and repeatedly note that they are BPA-free.
Many NUK cups are described as leak‑proof or spill‑proof and use features such as soft spouts with caps/ covers, screw‑on lids, and break‑resistant construction to limit mess.
Some listings specify medical‑grade silicone spouts described as super‑soft or “2x softer,” while others simply list a soft spout; several entries list the lid material as plastic.