Trying to figure out tubs

So I have found a snake rack and I am looking into tubs. I have had from other sources to dismantle the shelves and re-screw them on. The problem is that the screw heads (I hope that is their name I know little to nothing about building stuff) are not showing at all (and I checked to see if they were being hidden by a fancy sticker thing but nope). Even if I could get the shelves off I have little faith in being able to screw on the shelves back on straight (not kidding can't draw a straight line with a ruler). So I am looking into maybe getting tubs with lids. The problem is ventilation (and maybe others you guys can think of). I was thinking of making very small holes on the sides, would that help?

Here is a link to my video of the "rack" I am hoping it will work out since I just found it near the garbage.
http://www.youtube.com/watch?v=BsGieUFBiSk
Thanks for the help

Putting holes into tubs for ventilation is fine, and very easy. I prefer to use a cheap soldering iron to melt the holes in to reduce the risk of cracking tubs and to prevent any sharp edges from being created by a drill bit. I aim for 1/4" to 3/8" diameter holes.