Capacities commonly range from about 12 ounces up to 20 ounces. Typical sizes shown include 12 oz, 13.5 fl oz, 14 oz, and 20 oz.
Bodies are primarily stainless steel (often 18/8 stainless steel). Lids and other components are usually made from polypropylene or other plastics and silicone.
Common options include flip-straw lids, dual lids with a soft straw plus a chug spout, twist-off or screw-top lids, and flip-top spouts. Some models include extra straws or a locking mechanism on the lid.
Many models advertise leakproof or leak-resistant lids and locking lids. Designs often aim to be leakproof when fully closed and spill-resistant when opened, helping reduce spills in backpacks and lunchboxes.
Several bottles are described as cup-holder compatible or cup-holder friendly. Mid-sized options (for example, 14 oz) are often noted as easier for small hands to hold.
Some listings specify suitability for ages 3 years and up, while others note the product is not for children under 3. Overall, many models target preschool-aged children and older.
Many descriptions specify BPA-free materials; some explicitly state bottles are BPA- and lead-free, and a number also note they are phthalate-free.
Common accessories include lids and straws, easy-carry handles, and sometimes a silicone boot or extra replacement plastic straws.
