I use a soldering iron to make the holes. Makes a nice smooth ring of plastic around the hole that the snake couldn't cut itself on. Soldering irons get hot enough to melt metal, so they sure will take care of any kind of plastic. Plus it's extremely quick. Just make sure you rinse everything off when you're done.
Most of my BPs started out fine in a 28/32 qt Sterilite tub. A couple that were more fearful and had less consistent feeding got downgraded to a 15 qt and that fixed the problem. The choice is yours for what to start with.
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