Actually I use the standard plastic topsider on operating temp oil. I have an infrared thermometer, so I can measure the temp of the oil that comes out. Usually my oil is around 160 F or so when I use the topsider and I have not had any problems at all so far.
I do not, however, pump it fifty times and then use it on hot oil. I pump it 5-10 times at a time so that there is less pressure on the container while the hot oil is in it in order to avoid the possibility of a meltdown.
Works so far.
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record