We’ve brought 1 liter bottles. And you cant tell unless you read the bottle. Was No problem for us. A lot of wines by us now as a standard are 1 liter. And bottle sizes look the same as 750. Glass thickness and shape makes a difference. 250ml is not that much more from mass. I think they focus on 2 bottles.
Now 1.5 would be noticable imo and a red flag.