K.Z.
Hi H.,
I am with Jessica E.--try a sippy cup!
Also, contact your local La Leche League group and maybe go to a meeting (every so often a group will usually have a meeting devoted to the topic of weaning--but all questions about any aspect of breastfeeding are always welcome). Or the Leader can give you info over the phone. Their toll free number is 1-800-LA LECHE. If you call they will put you in touch with a Leader near you. Or try searching for them online, I'm sure they have a website, just don't know what it is.
It's great that you are breastfeeding him--I know you say you want to wean, but I hope you will at least consider continuing nursing, especially if you will be working more soon. You may be bringing home more germs from work, nursing will help him fend those off. Also, a healthy baby means fewer sick days you have to take, in order to take care of him (be aware that some day cares don't want sick kids there).
Congrats on your little guy, and good luck! Enjoy him, he'll be grown sooner than you think!
K. Z.