Mainstays 37-Ounce Plastic Color Changing Tumbler, Blue

from MrProsandCons

Pros Great size Solid feel Fun changing color Cons Color change is not as dramatic as I expected This is a great cup. Great size for just about any type of beverage. The only problem I have with it is it doesn't start getting lighter until somewhere north of 70 degrees. So if it's cold ...

from mosam11

Overall, I am fairly happy with the Mainstays 37-ounce plastic color changing tumbler. The color is blue when it has no liquids in it. It turns to a dark blue color when it has liquids in it, typically iced beverages work best. However, it's barely even noticeable that it changes colors so that w...

from

These cups hold a lot and really do change colors. I would recommend purchasing

from gwood658

This is officially my Sweet Ice Tea Cup !! Holds 37 ounces, and with the ice, or something cold, it turns a dark Blue. This cup is perfect for outside on the Deck, you won't have to make so many trips to the kitchen. I highly recommend this cup for purchase.

from

These cups hold a lot and really do change colors. I would recommend purchasing