The bottle body is stainless steel and the lids are plastic. Many listings also note the materials are BPA-free and lead-free.
One product description claims drinks stay cold for up to 24 hours, and customer reviews generally report that the bottles maintain cool temperatures as expected. Actual performance can vary by model and conditions.
Most listings emphasize use with cold beverages. Some product descriptions state certain models are suitable for hot, cold, and even carbonated drinks. Because capabilities vary by model, check the specifications for the exact bottle you’re buying.
They advertise leakproof and locking lids, plus a built-in carry loop on many models that can double as a transport lock.
Yes — listings describe them as cup-holder friendly, and reviewers frequently note the bottles fit well in bags and standard cup holders.