Once they can sit comfortably, otherwise use the lieibg down ones ????

That’s when mine went into the front seat of a shopping trolley. There are lie down ones that you can use for younger bubs

I think the little red baskets ( like the Coles one )could be relatively safe for the ones that are less than 12 mths as it looks like it is built for babies, but if you intend to sit in the trolley itself , they must sit upright by themselves and should use the belt that is provided which I used to use when my kids were toddlers. Very handy .