Is old stuff not needed anymore?

Slurp! Ah, Attijay, discerning the value of items is the start of wise economic activity, hmph! If you've obtained a higher-tier producer, lower-tier items might just take up space, so check your orders and tidy up, hmm! With a benevolent heart, I shall cheer for your efficient cafe management!

I know, right? I thought it wasn't coming out, so I deleted the merged drinks, and then it reappeared lol. The drop rate seems really low. ㅡ.ㅡ

I've been hoarding them, but my bag is too small.