Hell yes ! That shaker cup is above and beyond ! .. I managed to crush it about a month ago, and Gaspari hooked me up with a SuperPump250 shakercup. I used the metal-ball/shaker in the Gaspari cup, and fortunately, it was 99% leak proof, so it's worked out thus far. (You're talking about the shaker cups identical to the two in steveoph's pic, right ?)
Then . . NUTRAPLANET came through for me ! i got my order in yesterday, and they had thrown in a hugh 24-26 oz. Optimum Nutrition shakercup with a RUBBER top that extended the volume even further. It's LEAK-PROOF, and I use the metal ball/shaker in there as well, and mooshed banana, peanutbutter, oatmeal and everything else is churned out, and stays inside the cup !
Props to NutraPlanet for hooking me up, and for ON for finally coming through with a kick ass shaker cup ! (it's awesome how the shaker/metal ball works anywhere.. if you crush your original shaker cup, get a leak proof one, and throw the ball in there..)