can we use a souvenir cup from busch gardens at the busch gardens in tampa

Yes

I assume you mean from Busch Gardens Williamsburg to be used at Busch Gardens Tampa, they will fill any cup You should be able to use it, however whether or not you get the reduced price for all day regions is the question. I would contact their guest services to find out.

Yes you can they all over the place

You should be able to but to make sure just give them a call.

Discounts for refills are only good on the day you purchased the souvenir cup. I read that on a sign by the cups 2 days ago, (6-9-18).

Yes any cup u got they refill for a 1.00 in tampa