I’m looking for a decent insulated mug. One which the lid is either screwed on, or offers a VERY good seal. I work in a mental health locked ward and can’t have porcelain/china due to risks of patients using it as a weapon or to self harm with. I also need to be able to put it down if something or someone is arcing up, and if worst comes to worst and it gets thrown at me, I don’t want hot liquid spraying out over me or my colleagues.

I saw this one but wondered if there was anything else someone used that might suit me?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110523023553&ssPageName=STRK:MEWAX:IT#ht_2301wt_1166