Have you patented the 3L and 2L bottles of Blue Moon laundry detergent? Do you have your own trademark, and the company can use the bottle type of Blue Moon laundry detergent?

See if Blue Moon has applied for a design.

Strictly speaking, as long as people apply for a design patent? Even if your trademark logo is different, the structure of the outer packaging bottle is infringing.

So it's best to design it yourself. You can refer to other people's products and design them with a little change.