"Two words: No way."
I've got to disagree, Bob. I don't know about 14 days, but I know I can get 10 days in an Ursack without too much trouble. If I really tried, I'm pretty sure I could squeeze in another day, possibly two. If I am correct, that would give 11-13 days, assuming you carried your first day of food outside the canister. A Garcia has a volume of 614 c.i, ~36 less than an Ursack, so call it 10-12 days to be conservative. The bad news is that my diet is not for everyone. To make this work, I go cold food except hot water for coffee/tea, and place a heavy emphasis on crushed nuts, chips, sesame sticks, 72% cacao chocolate, and olive oil, with Perpetuem for lunch. Everything except the chocolate bars and olive oil is crushed or ground and packed into sandwich baggies. This allows for very tight packing with maximum use of space since every baggie conforms to whatever surfaces surround it. The chocolate bars are layered horizontally. and the oil is in flat plastic flasks which can go either vertical against the wall of the canister or horizontally, with baggies packed around them tightly. All of the food items except Perpetuem, which serves a different purpose, are calorie dense, 120-250 calories/oz, and 20-21 oz of food/day yields ~2600-2800 calories, depending on what I choose for a particular trip. As I said, this diet is not for everybody; it's definitely not gourmet, and there's no allowance for noodles, lentils, or any bulky items, let alone fancy sauces, etc, but if you want to get out into the backcountry for an extended trip, it will do the job. I've had it up to 11 days so far and it works for me. YMMV