sippy cups

We've tried several different sippy cups (for water and diluted juice) and and concensus is that NJ knows how to hold and drink from them, but isn't interested! He may take a sip here and there, but most of the time he will shake them and throw them. He actually was doing better with them a couple of months ago, but now he think they are toys. Or, he takes a sip and spits it right out over and over so that within a span of a few minutes, his shirt is soaked.

Is this a phase and will it pass? If so, when? Or do I need to start looking for another type of cup? he will not take a bottle anymore.