This is a Double Walled acrylic cup with screw on lid & straw. The double walled cup keeps hands and table dry from condensation and keeps your drink cold. This Eco-Cup is for cold beverages only. I Am Not a Plastic Cup, but I am designed to look like one. They are 4 inches across and 9 inches tall with the straw. The acrylic straw has the added bonus of a ridge around the bottom of it to keep the straw in the cup, so you never have to worry about losing your straw. Do not use in dishwasher or microwave.