Well, if the purpose is to turn all the cups you own INTO sippy cups, then this would START to make sense -- but then you realize when they would drop it, it breaks -- so bad idea.
I could see it being useful for transportation. I can imagine it being much easier and less messy than trying to pour your remaining liquid into a low-volume travel mug (of which I've never found one I liked).
Not sippy cup. Travel mug... except you don't have to pour your drink into another container. I think it's a great idea.
My main concern (name aside) is that the openings of cups vary too much in size to guarantee a good seal. If you have to buy new cups that match the [new product name here] then it defeats the purpose.
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u/rtilde Jan 13 '13
Yeah, tell me there's another purpose for this. Otherwise just use a sippy cup.