I stumbled across a smaller size version last year at a store and loved it. The flow is really great from the straw, and the opening is large enough when you remove the lid that I can scoop ice into it.
I love my two new smoothie tumblers! I am a regular juicer, so I use my tumblers almost every day. They are just as advertised. Sturdy, well-made, and very attractive too! :) I am very happy with my purchase...and with the speedy delivery as well. I highly recommend this product.