Mine comes in a packet. I do have 2 packs in the cupboard. So that will last a few months.
What do you do for cutting it, just lop off the ends every so often?
Until about 18 months ago, I kept my hair nearly shoulder length. Then my stylist left and the first time I went to the new one, she said, "So what're we doing today?"
I said, "Just trim it up a bit."
She cut off about two inches!
Over subsequent visits, no matter what I'd say, she'd cut a little more off, then a little more off, until now I'm sporting a fairly typical men's haircut.
I can say, "Winter's in a few months, and I want to grow it longer for cold weather," and I'll get, "Ok!," and then she'll give me the usual cut.
I don't know if it's the only way she knows how to cut hair, or if she's subtly saying, "The hairstyle you want...is not for you."
She's such a nice person, though, and so much fun to talk to, I don't want to let her go!