Common styles include weighted straws, soft silicone spouts, removable/peeling straws, flip-top and twist-off lids, one-way valve straw lids, and push-button/autospout designs that protect the straw.
Many cups are labeled for 6 months and up, some for 12 months and up, and a few designs are recommended for around 3 years and up; manufacturers' age guidance varies by design.
Some designs have as few as three pieces (cup, lid, straw) for easier cleaning and assembly; others include extra parts such as weighted-straw assemblies or come with a straw brush.
Many cups include built-in handles—single or double—or a carry handle; these features make it easier for small hands to grip and enable one-handed use.
Some cups use dual-wall vacuum insulation and stainless-steel construction to keep drinks cold for many hours; other cups are described for cold beverages without specific insulation features.
