Ok, so she either weighs nothing or they've got the front loaded up with shit, because there's no way a full grown mermaid that looks to be about 5 foot 5 with average weight could sit in that part of the shopping cart without it tipping over ...
It's Lidl so it's the latter. They've got chainsaws and doormats aplenty...
Half assembled floating shopping carts and wheels lying around, yep that's Lidl.