I emailed the ticket office about stinger seats and asked about getting one water bottle. Here's the response from the guy in charge of ticketing. It makes sense.
Thank you for your email. This year we are rolling out a new clear bag policy. We delivered information on this policy to season ticket holders along with a clear bag and water bottle to serve as an example of the type of items permitted in the stadium. (Fans can bring in additional bottles, and filling stations are location throughout the stadium.) The season ticket holder gifts this year are adidas t-shirts -- you will receive one per season ticket. I hope this provides some insight into our intentions regarding the water bottles.