From the product description, check product page for current description, price and availability:

• The cups are made of stainless steel, crafted from 304 grade 18/8 stainless steel. Using the concave stretch technology. It is strong and doesn’t break easily.
• The double wall vacuum insulated travel cups with lid can keep the drink in the cup warm for more than 3 hours and cold drinks chilled for more than 9 hours, This cup will not have condensation on the outside.
• The lid of this cup is push-sheet type, you can drink by simply taking the lid off or pushing the slide off the lid, Push the slip away and you can also insert a straw to drink.
• The curved design makes it easier to control the cup. No handle design can save space.
• You can drink with this cup with your friends, family at home, camping, hiking, even in the car.