Can any of you tell me what's wrong with this picture?

a) Tyler is wearing a sweater in July.
b) He's got a little something on his upper lip.
c) There's a Nuby lid on a Gerber sippy cup.
d) All of the above, really, but especially the stupid sippy cup thing.
How hard is it to match up a sippy cup to its appropriate lid?
Nate says hard. Apparently, Tyler Florence agrees.
Normally, a milk ad would not be blogworthy. But I have been giving Nate the hardest time about matching up the sippy cups with their correct lid. Every time he gives Calvin a drink it's in a strange combination of cup/lid — between colors, sizes, and brands.
To me, which cup goes with which lid is a total no-brainer. Of course I do the sippy cup purchasing. But still - it's not difficult to match them up! In fact, the other day Nate gave his brother Mike a sippy cup/lid test (hoping to prove his point that sippy cups are
really really hard) and he passed with flying colors. He even matched the colors correctly within the same brand.
But then there's this. An ad I ran across in Martha Stewart Living magazine featuring the exact two brands of sippy cup we have at home, mixed up.
I don't question Martha on anything, not even her editorial decisions regarding advertising, so I will trust that this — though inherently wrong — is the presentation I should be using when offering beverages to my child. Especially if I expect him to grow up to have exquisite taste and an appreciation for Good Things.
Sigh. Score one for Nate. He's such a visionary.