Pizza boxes are designed to be flat packed for ease of storage. Making them square makes this easier they can then be folded in the shop ready for use.Round ones do exist - Moulded in most cases and I guess more expensive to make because the process is more complicated.The pizza box if delivered is going to go into a square bag soe the shape keeps it oriented in the bag.
Thank you dear. Thanks a lot, you are so special to me and your wishes too. I can’t believe I have to wait another year to hear such sweet things again. And i love you so much. You are the one who makes me whole. Once again i thank you for this compliment and the wonderful wishes, i will never eve