I've been using S-hooks and they work amazing! All that you need is a drill or, even better, a soldering iron to melt the holes through!
Heres a quick step by step.
Melt a hole through the lid and container so that the hook may pass through, but be sure to separate them for a second afterwards if melting so that the two don't stick together!
The the S-hook will go through both holes and secure the lid. What I have done for extra security, so that the hook doesn't fall out, is put a second hole higher up where the hook may re-enter once fully inserted. Heres a couple pics to show the diff between only once through and then doubled back...
Hope that this helps!
Brent Strande
PS I prefer rubbermaids over sterilites as the sterilite lids suck IMHO!! Good Luck!
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Brent Strande
0.1 Corn Snake (Anery), 1.1 JCP (High Yellow), 1.1 BRB, 1.0 Albino BCI, 0.1 Het Albino BCI, 1.0 GTP (Jayapura type)
www.freewebs.com/brentstrande