Welcome to the forum!
If you would, please do make your next post your Introduction here, which we need per the forum rules.
First, offerings are made for a reason. WHY do you want to make an offering?
I think it’s ideal to make an offering AFTER a successful working in the spirit of gratitude. I never recommend offering as worship, I think that’s weak.
Do something to not waste his time first. Ask for him to help you with something. If he does it, and if you feel so happy that you want to do something nice for him because of it, then pour him a nice glass of wine, leave it out for 1 to 3 days on the side, or your alter if you have one. After the day has passed, pour it down the sink. (You could drink it but it will be vile after a day if it’s wine)
That’s what I do. The other thing I will dom if pour two glasses, one for the entity and one for me, and share a toast. I drink mine, and he drinks his. After a day or so I pour his away.
If I offer fruit, after 3 days I eat the fruit.