I had the visit from the Speech Therapist and she told me to hold my chin down while drinking, hmmmm, I thought...
Anyway I've found that using a travel beaker helps, I've got a trendy Starbucks one which is really easy to hold, keeps your tea warm when you forget to drink it and has a small hole to drink from, letting the cup be tipped instead of your head back....
I haven't had a choking episode since. I'm going to take it to Tesco's cafe today, if they let me use it then I'm off everywhere for a coffee!!! Something I haven't wanted to do for months.
Hope this helps