Mine is just two bottles of milk (Tesco lets you check out with as little as you like)
I also shop for my mum, but from a different supermarket which has the £40 minimum checkout spend, so I always stick two bottles of whisky in her trolley, or three if it is on offer and two bottles are not enough to make up the necessary £40!
So far, I have always remembered to remove them when I do the proper order, but one day ...
Mum took some convincing that there is no real person taking this order at the other end of the computer, and was very worried about what they would make of her excessive whisky orders