When I started exploring, I was thrilled to discover the joy of drinking from a bottle. I would suggest starting there. My favorite, even over my adult sized bottle, is this one:
http://www.walmart.com/ip/Playtex-VentAire-9-oz-Wide-Baby-Bottle-5-Pack-BPA-Free/34074087
You can go to your local walmart, or even many grocery stores and find this model. Or you can order from amazon if you are afraid of the checkout.
If you don't like the idea of a bottle, you can always try a pacifier, there are a large selection of those on pacifiersrus.com, but those are expensive, so I would suggest other routes.
There are cheap adult pacifiers you can try
http://www.amazon.com/Baby-Pants-Nu...?ie=UTF8&qid=1453782475&sr=8-2&keywords=nuk+5, but they are plain white.
There are also these which are colored and a lot cuter, but pretty lame quality (I still like them anyway for the price)
http://awwsocute.com/adult_sized_pacifier
Edit: (There is also this one that is a good middle ground paci, on both price, cuteness, and quality
http://www.amazon.com/gp/product/B0...rd_t=36701&pf_rd_p=2091268722&pf_rd_i=desktop)
Getting an adult size paci is really helpful because it is more comfortable in the mouth, however, there is this cheap alternative which works pretty well, it is the largest child size paci that I know of.
http://www.amazon.com/gp/product/B00IOQ97JC?refRID=E1ZSQTH7KDA340VYAC4G&ref_=pd_bia_nav_t_2
Otherwise just go down to the store and buy the largest cutest baby paci you can find and see what you think, it is still fun even if it doesn't fit well, but you won't like it after a while because your jaw will hurt a little.
If neither of those, then maybe a stuffed animal would be fun to have, in fact, if you don't have one already than I think you are crazy, because stuffed animals are the best, and the last thing I would ever get rid of (I know from experience).
Also, something that you might find as fun, things that rattle. I actually discovered on accident that I love soft rattle toys. Reference:
http://www.amazon.com/Child-Mine-Ch...d=1453782870&sr=1-26&keywords=lion+rattle+toy