Make sure it is okay to use a straw before doing so. It would depend upon what type of oral cancer your husband has. For example, as a tongue cancer patient, I wasn't allowed to use straws right away because it could potentially affect the sutures on my tongue.

As for a water bottle, I use a stainless steel canteen that holds 24 ounces, which is good for sipping on as needed. However, I don't feel I can get enough fluids during the day when using the canteen alone. That's why I prefer to use a glass/cup during the day to drink.