Tip #1: It's been a while since my son was in treatment, but I remember that his tastes changed almost daily, so when we found something he liked, I would buy a lot of it which was a mistake. At end of treatment, we ended up giving away a large quantity of different soups, drinks, etc. to someone else going through cancer treatment. When I bought a large quantity size (and expensive) protein powder that the health food guy said had no taste and would go fine in anything, it got a very negative reaction from my son the first time he tasted it in his milkshake. So I would say, just buy small quantities of anything your husband is likely to eat or drink since he may experience day to day taste changes.

Tip #2: Things to have in the car if you are going even a short distance to Rad Tx:
Bottled water, plenty of towels, tissues, wipey things, and most important, one of those square plastic dish pans (throw-up bucket). For some reason all through Tx, I hadn't thought of having something like that until the very last Rad Tx when Paul received one from the nurses as a "graduation present". It had some paper towels in the bottom which was a very good idea (provides easy clean-up). There are so many things that didn't occur to me while he was in treatment, probably because I was not always thinking clearly. Once when we were on our way back from treatment (a 15 minute drive), on a narrow country road, he yelled to stop the car!! I stopped and noticed we were in front of someone's nice looking house with a nice looking driveway. Paul started to open the door but kept motioning to move forward so I did and parked next to some bushes where he let loose with everything that was in his stomach! There were several episodes like that where we had to find some suitable place for him to lean out the car and throw up. I did not always understand his directions and it was so frustrating for him, to say the least. Sometimes it took a while for him to decide where he wanted to throw up. Bottom line: Do have a nice square plastic dish pan with some paper towels in the bottom that you can keep in the car. If you think just looking at the dish pan will make him gag, then hide it under some bath towels until or if it becomes obvious he needs it. You can paint a nice smiley face on the outside of it with a permanent marker. Hopefully your husband won't ever need it but if he does, it will make life easier.