Instruct: Classify Amazon reviews into positive or negative sentiment
Query: These are the best glasses I have ever owned

I bought the 16oz version of these glasses along with Tovolo King Cube Extra Large Silicone Ice Cube Trays and then found that the ice cubes it made were too large for those glasses. I liked the design of these glasses a lot so when I saw the 20oz version I purchased a set of those as well. the ice cubes from the Tovolo tray just barely fit into these glasses and one of those ice cubes can last for 1-2 hours in these glasses (or overnight if left in the refrigerator). The glasses do a great job at insulating beverages and they also help prevent glasses from sweating. If there is low humidity there will not be any sweat, but if it is very humid out then these glasses will sweat, but not nearly as much as a regular glass will. I would strongly recommend these glasses to anyone.