Services paid through a donation rather than a fee is it legal to do

Could you please explain this better, your question is not clear. Whose service, whose donation. What fee

Yes, professionals donate their services all the time like in the medical field and it is legal.

Our company donates to a 501 (3) (c) and in return for that donation they provide us with bottling and packaging is that legal and does the donator get a tax credit?

DrJ: please do not use the "comment" feature of this web site to post a follow-up question - please use the answer box instead.

If a donor receives goods or services in exchange for a donation, then the value of the donation is considered to be reduced by the value of the goods or services received. So yes, it is legal for the donor to take a tax deduction (it's a deduction, not a credit), but the amount that can be deducted is less than the amount actually donated. The 501c(3) is responsible for providing a receipt to the donor and indicating the amount that may be taken as a charitable donation.