Anyway it sdoesnt stop the rim being too hot, as it sits just inside the cup and acts as more of a lid. Drinking with it fitted, your lower lip would still be touching the lip/rim of the cup
I cant say I ever found the crusader's rim too hot to drink from even straight off the burner (gel, trioxane or hexi)
Are you drinking it straight off a gas stove? Maybe thats why its uncomfortably hot.
The Teflon mug + rim from HM is okay, but is the coating foolproof? Thats why I prefer the brushed stainless steel of the Crusader. You cant fück it up in normal robust, devil-may-care squaddie style use.
No teflon for me; stainless steel all the way, with a bit of old T-shirt inside to stop my waterbottle rattling. Teflon isn't soldier-proof, flakes off and is toxic once it has flaked off, and all it does is look ally and make cleaning a bit easier. Besides, it adds about four quid to the cost of the mug.