If you are going to use them all within a week then just leave them in the tubs. If it's longer than that, you can buy Kricket Keepers to put them in, or just a normal plastic tank.

Locusts need to stretch their legs though, so they will need a plastic tank to live in.

Mealworms can just stay in the tub though, just keep adding bran/weetabix for them to eat and burrow in. Mealworms should only be fed as a treat - once a month maybe. They have high levels of chitin intheir exo skeletons which can be hard for lizards to digest and can cause impaction.

Feed them all on Spring greens - it's high in calcium. Other fruit and vegs can be given too. Just stay away from spinach as this is calcium binding