J.S.
Have you tried sippy cups? My little boy took to those immediately, although I introduced it way back at 6 months. Anyway, my little boy is 14 months and he just learned how to drink from a straw. I would stick it in a glass, put my finger over the top to hold the liquid in, then put it in his mouth and let him suck it out. Once he got good at this, I started holding the straw at an angle like it would really be in a cup, where he'd have to suck to get the liquid out. I'd still hold my finger over the end so he'd have to suck. He got the hang of it now and loves it! Good luck!