I have to be honest and say I think the people at cheaphcgsupplies have no idea what they are doing. For a 23 day they tell you to only inject for 20 days. That is wrong. Also I am confused on how 5mL can hold 5000iu. It just won't fit if you mix right. besides it depends on how much you want to inject. if you choose to inject 1cc then the 5mL bottle is only going to hold 5 days. Even at .5cc it would only hold 10 days. Which clearly would only give you 20 days of injections. 1mL = 1 cc so it doesn't make sense to me how they can say on their site that 5mL can hold 5000 iu. .... Sorry I am just thinking out loud again.
One 10000 iu at 200 iu is only going to last you 50 days if mixed right. Then you take that the 50 and multiply that by .4 cc and that gives you 20mL of water that you need to mix your hcg with.
So I would take your bac water draw 19mL of water out add that to your mixing bottle. Draw another 1mL of water from the bac water and add that to your hcg. Then move that over to your 19mL. That will give you 50 doses at .4cc
I am pretty sure I did my math right. Check out this thread: http://hcgdietinfo.com/hcgvanillaforum/discussion/2657/newcomer-information-mixing-your-hcg-help-me-with-the-math/#Item_1
If you decide to use your bact water bottle to mix in you need to take 11 mL out discard 10 mL use the 1mL left to dissolve your hcg then add that back into the other remaining 19mL.
Good Luck! I am sorry this is so confusing. There are some great newcomer threads to help with all of this. I will see if I can find the buy, mixing etc thread so you can find some different places to buy from.