It CAN'T and that is a problem I am having with several of the recipes...I purposefully buy SMALL fruit and veg, and I cannot fit the amounts suggested in the recipes into the large cup. I have had to compromise--a half a banana and a half of a pear OR a half of an apple and 3 1-inch cubes of pineapple in the basic blast, along with the greens and 6 almonds and water. Beyond that does not fit. I greatest concern is, then, that I am getting compromised nutrients in variety at the very least...And because I have a cut piece of fruit awaiting my next blast, I am losing nutrients through the cut surface, even though I wrap and refrigerate the apple or pear and banana as quickly as possible. THAT'S frustrating!
If you want to preserve nutrient content in your fruits and veggies, you can always put them in the freezer. Just make sure they are prepped and ready to go into the NutriBullet before you freeze them. The recipes we have are guidelines since fruits and veggies vary in size. As long as you are getting all the ingredients in your cup, the exact amount is not important.