Ok, any tips about getting smoothies, etc.. to work? What kind of problems have you had?

I think it depends on the environment you work in. I work from home, so obviously not an issue. Some people, like those who work in nursing or retail, may have rules against drinking/eating while on duty. In this case, it's best to talk to HR or a manager about getting a doctor's note to allow them to eat/drink while working. After surgery, it's not possible to eat and drink quickly, and you will need to sip all day to get your fluids in. If you have an active or outdoors job, it's even more important to be drinking a lot.

I'm not sure why a smoothie in particular would be difficult to drink at work, although you'd have to have someplace to wash the container so it doesn't get gross. I assume you would make it at home? Probably for the first few weeks/months a smoothie wouldn't be the best bet as it's too much fiber and not enough protein; a protein shake is better for that (personally I can only tolerate the premade kind because the ones make with powder always seem gritty to me). I also am eating a lot of yogurt; maybe you will need a small lunch bag/box that is insulated and some ice packs which you can buy cheaply on Amazon.