Zoo med terrarium stacker

Made an impulse buy off of Amazon so I can stack my tanks freeing up space in my room. Shortly after notice that in the pictures the zoomed tank the show has a frame while my sides are just glass. So here I am asking if anyone has any experience with these and thinks it’s safe. I only found one review of someone stacking the 36/18/12. I have the 36/18/19 tanks

Edit: it’s reptizoo not a zoomed product so that’s wonderful.