I have found these in clear, aqua, green, amber and red. The first three were purchased as Blenko water bottles. Until I received them, I did not realize that they have an optic pattern on them. They have a similar pattern to the Bryce water bottles but they have the square shoulders and the right angle spouts of Blenko water bottles. Two of the three were purchased before Blenko began to make optic water bottles. (More on that subject later.)
The red water bottle reacts mildly to ultraviolet light.
This clear is actually a very pale blue.