BBF, some of these customers have shipped product as long as two years ago. Yet here we stand looking at about 100,000 in revenues for a quarter and before that it was about 10K per quarter. That doesn't scream large scalable numbers. We've made a lot of assumptions that because this box had better and more consistent holding times that its got to be used by anyone with a half a brain. Looking back on this now, I can see why there may be some resistance because of the number of samples that can be shipped at one time could be significantly lower. It becomes a question of safety and quality vs. cost. We really don't have an apples to apples comparison on what the dewar can hold vs. a box of dryice.