Extremely strong preference use up open thing before open new one same thing. Not sure roots: thrift? OCD? Ordinary persnickety? Anxiety regarding two sames open same time increase with item value $US + longevity.
Level 1: Kind of annoy, but ok:
Level 2: annoyance + whisper of character judgment. How bratty to open your favorite flavor instead of using the open flavor! And No one likes the blueberry! Do your fair share of blueberry! <–That style of thoughts.
Level 3: Regret + possible develop eating disorder. Marmalade only use occasionally, toast. Currently two large jars open. Take entire year consume one jar. Too much pressure eat marmalade aaaaaagh! Intensity of bad feeling worsened by fact: it Bigfoot fault.
Level 4: Uber anxiety. What if we get into a THE ROAD situation? Why hasn’t the three-month mail-order supply arrived yet?
And This is so wasteful—the camera man/spies will definitely include it in the reality show about me to illustrate how wasteful I am.