I use bran from the stock food shop--it is cheaper, some use bran and wheat germ. The wharehouse have 3 sizes of mesh cake protectors that make good seives of the right gauge and they fit neatly on top of a large plastic paint tin---makes a very convenient seive set up. They also sell a similar but finer seive that is coloured red or blue.The two dollar shops have even finer seives that are good for mini mealies. Seive the bran and use what passes through the s/s seive for meaworms and what doesn't for your locusts.The seive can also be used to grade the mealworms into large and small. They (and beetles) will not crawl out even if left overnight.The coloured but finer seives are ideal for mini mealworms--beetles and crysalis do not pass through but mini mealworms do (again use the bran that passes through the seive). I use the sets of draws from the wharehouse as they are well ventilated and the mealies don't crawl out and moisture from a carrot. I have seen others use spuds, apple, banana skin, and cabbage leaves. The best is what works for you. Have a good chrissymas.