Food-Grade Material: The 20 oz sublimation skinny tumbler is made with 18/8 304 grade corrosion-resistant stainless steel and has a BPA free splash proof lid which opens and closes smoothly.
Double Wall Vacuum Insulation: A double layer of stainless steel prevents heat transfer. Keep your drinks at the right temperature for more than 8 hours!
I gave my 3 daughters a personalized tumbler as their end of the year school gift. They LOVE them! It has even cut down on my dishes because they are using their cup throughout the day!
Everyone loves the design and that they keep their water so cold. This will not be my last order for sure!