check the bottom of your container in the recycle sign should be a PET or PETE. You can heat those container up to 150°F they should not deform below this temperature and PET/PETE does not give any poison chemicals in the environment even the recycled PET.
Also note that inside the recycling triangle there is a number. The number would be "1" for PET...#2 is HDPE. Interestingly, PET/#1, which soft drinks and bottled water come in, is porous and allows gases to pass through. It is known to harbor bacteria in it's porous material and to leach certain chemicals/toxins. It is also not recommended for re-use. HDPE, the old "milk jug" plastic, apparently has a better reputation for being "food safe" and for being reusable. As Michael Bush mentioned, the HDPE jugs will take a *lot* more heat than the PET jugs will. In mead making many people will not age it in plastic due to it's porosity and the associated oxidation fears/issues but rather will age it in glass. To what degree all of this will affect honey is a question. I would think that for someone likes to keep some honey around but who doesn't eat much honey, maybe only a pint or two a year, that a glass container might be better. Most regular customers eat more than that, though. One aspect of plastic versus glass....that glass is easy to recycle for the hobbyist.
Having said that, my mentor is making the change over to plastic this year. He just purchased a 12 gallon bottling tank and bought several cases of plastic 1-liter "mini jugs" and a good many pint flip-tops. These are #2 plastic. He is 80+ years old and has downsized to around 35 hives this year. His reason for going to plastic is in response to customer input...his customers are mostly older or senior adults and many have asked about having a container with a "handle" on it to make it easier for their hands to grasp. He had gone to the plastic pint containers last year and sold everything he put out, these were smaller in diameter than pint canning jars and I'm sure was easier to hold...it worked for him.
One good thing for me....he's giving me the glass jars that he has on hand...he said if he's going plastic that he's going all the way with it.
I figure I will stick with glass for quiet a while until one day I look and I'm (hopefully) 80 years old and have 30 or 40 hives and figure it's time to go the plastic route...and then I'll pass my glass jars on to some newbee coming behind me.