Years ago I found a plastics company that had a huge variety of clear plastic tubes. I bought hundreds of feet of it and shared it with a bunch of my zoo colleagues. I never did ask what else it was used for. Good question.
Regardless, I got it pretty cheap given I bought so much of it. But later when I got the basic kit from Midwest I prefered that. Their tubes are more expensive but I liked how they were slightly flexible. For some especially spastic venomous I felt I could secure them in the tubes with less risk of injury.
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Current snakes:
0.0.1 Gonyosoma oxycephala - Java locale (green)
1.2 Gonyosoma oxycephala - Jave local (green)
2.2 Gonyosoma janseni - Seleyar locale (all black)
1.2 Gonyosoma janseni - Celebes locale (Black & Tan)