They start with thicker items as these are least likely to "leak" down Into your lungs. Thinner liquids easily run down the path of least resistance into the lungs, especially if you dont have an epiglottis. The Epiglottis is what closes to protect the lungs from food and fluids. I imagine this will be quite a feat to swallow and not aspirate. Perhaps the SLT has some swallowing techniques to teach you to prevent this from happening. I hope this goes well for you and that you are able to restart swallowing.
Tammy

Caregiver/advocate to Husband Kris age 59@ diagnosis
DX Dec '10 SCC BOT T4aN2bM0 HPV+ve.Cisplatin x3 35 IMRT.
PET 6/11 clear.
R) level 2-4 neck dissection 8/1/11 to remove residual node - necrotic with NED
Feb '12 Ca back.. 3/8/12 total glossectomy/laryngectomy/bilat neck dissection/partial pharyngectomy etc. clear margins. All nodes negative for disease. PEG in.
March 2017 - 5 years disease free. Woohoo!