So I'm sitting here at work and I feel like I may have had a mini breakthrough. I'm planning to build an adult rack for my breeding size balls and it occurred to me that the tubs I used to build my rat rack with are the same flippin size as the tubs I'm going to use for my adult rack (except for probably width and length wise but quart wise they're basically the same) and the concrete mixing tubs are half the price of sterlite tubs. So, long story short my question is could I use the concrete mixing tubs to house my adults in? Aside from maybe holding heat better than sterlite tubs I don't see what it would hurt. What does everyone else think?