This is no way to pack it. Glass, electronic or heavy items needs bubble wrap, and a box not too small where they touch the walls (parcels rolls on tapes in sorting warehouse, and the walls absorb the hit of the tapes or other parcels there, but it has not to be to big either, or the item might rolls inside the box.

Also with the said items, and i would put in very thin or chip plastic, as well, fill the space left in the box, with the item, in the middle of air cushion, styrene or A LOT of newspaper *bleep*, the item must stay in touch with this soft filling, but it has no to move to the walls, and the fillings will help absorb other damages from the walls as well, before it reaches the item. Also better to write an arrow pointing up asides with "top" on it so they won't put it upside down. I always mark them as fragile and top and bottom on each side. If you have a good person in depot or delivering, that spot your box wrong way, they will fix it, not everyone are careless. I have no problem help sellers to make a proper box, the issue I had, sometimes they told me I am wrong on this and the item arrived broken, no matter what service they did use. Sure Evri is always the exception, because when they throw it on the fence, even like this it might not survive...

Also heavy items crush each other in a box, I learned that the hard way, now I will require them in another small box, individually wrapped and filled, and then the 2 box in a big one filled. If the item are big and heavy, it is also better to have maybe 2 postage for it, rather then a huge box the courier can't lift, they will roll it. Difference is I am more willing to pay for this because I need the items often, rather then refund so if people here don't give a damn because there is a refund, buying here becomes an issue for me.