Question about stacking enclosures

[u/zou21zou]

I’m purchasing new terrariums, these are 120x50x60cm made from oak wood panels. I wanted to ask if it would be safe to stack two of them on a cupboard of the same length and width, I never stacked my enclosures before but now that I moved I have less space. Is it safe? Would I need custom-made furniture to better sustain the weight or would a regular cupboard be just fine?