I only bought one in secret and when the delivery came in i took the parcel immediately away because i know my parents forget about it very fast.
They don't notice what changes on my shelfes if it isnt a huge set. But now the possibilities are better because in Germany there are so called "Packstation"s where you can fetch the parcel 24/7. So you could let it wait there one or two days and take it home if the time is good.
BTW: Some funny ways here to stay under the wife-radar