Cart question in Starter kit

[erinpac]

Anyone know what the white/clear carts with the mega t-rex starter kit are? Are they one of the types on the site or just some odd one packaged with it? Apparently the bf likes how they look and hold up in his pockets.

 

[db13berry]

I believe they are called smart carts?

 

[erinpac]

I thought they might have been those, but was hard to be sure looking at them.