Most listings show capacities ranging from about 16 fl oz up to 40 fl oz. Common sizes include 16, 24, 30, 32, and 40 fl oz.
Cold retention varies by design and manufacturer. In these listings the reported cold/ice retention ranges roughly from about 9 hours up to 40 hours, with some items stating around 24–40 hours and one listing noting about 9 hours cold (and up to 40 hours for iced conditions).
These cups are typically made from stainless steel—often listed as 18/8 stainless steel or recycled 18/8—and feature double-wall vacuum-insulated stainless-steel construction.
Common options include built-in straws, flip-top or drink-through lids, locking push-to-open lids, multi-mode lids that let you sip or gulp, and spouts that support both straw sipping and wide-mouth swigs.
Many models include portability features such as handles or comfort grips, carry loops that can double as locks, grab-and-go bucket-style handles, and bases shaped to fit cup holders.
Listings commonly advertise leakproof or leak-resistant lids, locking push-button mechanisms, and spill-resistant designs intended to reduce accidental spills.
