The more she has time to think about it the more Jim has her full attention. So the captain can't make any for her, but Felix is well practised in creating them. Admittedly, she's not sure she's so eager to trust Felix in making anything for her to drink, but the possibilities...

"How does it work? I mean, how does it feel when you use one? Is it instantaneous or does it take a few minutes to work, or an hour? Does it make it easy to hold snow, for example, or does it just keep the chilly air from bothering you?"