anything at all thats airtight and lockable if possible. not only for protection but to save on horrendous dusting and be able to keep friends and kids from being able to touch ,those ikea detolf are great budget plenty glass so not frame heavy obscuring view they are but a bit weak ,light and rickety tho and require a bit of gap packing to elliminate dust / air
and you cant really get a lot in them but for the £ they are great
sometimes large fishtanks and reptile tanks are worth looking into to custom as they are strong / heavy and cheapish and readily available used / 2nd hand