What about freezing the fruit, then you don't need ice. My wife and I just used our GSI hand crank last weekend for the first time. We used frozen fruit, some juice, and I cranked them out on low gear and then switched to high and it was like I make at home with our $400 Vitamix. We never use ice in our Vitamix either, just frozen fruit. I understand you want to use fresh fruit, but maybe you could pre-freeze or possible mix fresh and frozen. I do that all the time at home too. Anyway, just some thoughts. Barring that, I would second some soft of drill bit attachment if you are already carrying a drill.