You can get a canister from Threelac for about $60 and from Raider, on this forum, for $50. If you take the recommended dosage of one a day, this will last for 60 days, which sounds like a good idea for the person's boyfriend who *may* have extra candida, but doesn't have symptoms. Some people on this forum, who have really fought back the candida, say they need even less than this after awhile.
For those with more serious candida issues, the recommended dosage starts at 2 packets a day and I've heard of people going as high as 5. So, if this fits you, it's probably going to cost more than $25 per month.