The lenses keep their promise: to be shot glasses made of ice. Should that they melt each be clear with me they keep but quite long (depending on temperature and usage). The only criticism is that they are hard to get out of shape. However, it helps here to warm the forms from the outside with warm water. I recommend the ice glasses after leaching with the outside briefly to dive in cold water and put again in the freezer - so they last longer because they are not already melted.
