Hydro Flask 40oz All Around Travel Straw Tumbler - Moonshadow: Vacuum-Insulated, BPA-Free

A: I use it for carbonated water, and it's been good at keeping the carbonation for most of the day (and cold always helps retain carbonation, as well). I'm not sure if it's safe for soda/pop, since the steel might interact with certain ingredients.

A: The tumbler is made from durable 18/8 stainless steel, with a plastic and silicone lid.

A: The double-wall vacuum insulation keeps drinks cold for hours, ensuring perfect hydration anytime.

A: Yes, its cupholder-friendly design allows it to fit seamlessly in most car cupholders.

A: Yes, the flexible straw lid is designed to be soft on teeth for comfortable sipping.

A: The tumbler is dishwasher safe; simply disassemble the straw lid and place it in the dishwasher.

A: Yes, there should be a clear plastic straw that attaches at the base of the straw topper you see on the top of the lid.

A: No, due to the suctioning feature that secures the lid and the open straw design I would not say this bottle is considered to be a leak-proof option.

A: Yes, the soft, silicone open straw design would make for an easy option to add a straw topper of choice.

A: The slim design at the base of the bottle allows for standard cup holder fit and bags alike, I would not stay the handle makes for an easy fit for a bags bottle holder design however.