Freshness and safety go hand in hand. If contents are not kept at the right temperature, potentially dangerous bacteria may grow rapidly and cause food and beverages to spoil. All Foogo® stainless steel products feature Thermos® vacuum insulation technology which has been shown to inhibit the growth of bacteria in a laboratory test sponsored by Thermos and performed by Cornell University. For additional peace of mind, Foogo products use BPA-free materials. The Foogo stainless steel straw bottle from Genuine Thermos® Brand makes it easy to keep drinks cold on the go. This bottle has a 10-ounce capacity and will keep contents cold for up to 12 hours. The contoured shape of this bottle is easy for little toddler hands to grip and hold. Thanks to the durable double wall stainless steel construction and vacuum insulation, this Foogo straw bottle will not gather condensation or leave water rings. A hygienic push button lid is simple to open and reveals a pop-up silicone straw that is comfortable to drink from. Cleaning is simple, just unscrew the lid and the straw can be completely removed and disassembled to two parts for easy cleaning. The bottle and straw parts are top-rack dishwasher safe, however, hand washing is recommended for best results. Not for use with hot liquids.