Regarding the Parmesan packets- I only use freshly grated Parmesan. When I was first married my DH asked what was wrong with the Parmesan in the green can. Blasphemy!! Fake cheese!
No mention of those many odd glasses and mugs you accumulate over the years and never use (you know the one that says happy 30th birthday and you are now 50 and never used it once!) I recently purged a bunch of these from my kitchen cabinets.
I keep the take out menus for those 3-4 places we order regularly from. Also, the extra paper napkins from take out go in the napkin holder with the ones I buy and get used up right away. I keep some plastic utensils - have a small container that holds them and don’t keep any more than fit in it. I am guilty of the water bottle thing - nobody in my family ever uses a water bottle yet I have a few (plastic ones which are out of fashion now that everybody uses the metal ones!)
I just realized we own absolutely no tupperware at this point in time. Leftovers go in one of my everyday dishes with a bit of saran wrap. Cheese gets stored in a zip plastic bag.
It sounds like a good idea to me to have multiples of things that might be in the dishwaser. I sometimes do have to pull a utensil out and wash it, but not very often. Sometimes I just wash my husband’s regular coffee mug if I’m not running the dishwasher that day. I use a cup from the everyday dishes. His is the only odd mug left in the kitchen. The everyday china is new for this house and matches the dining room and parlor.
We are in the empty nesting house, after cleaning out and moving from the house where we raised our children. Amazing how streamlined and organized one can keep an empty nesting house! 
We have take-out menus for places we order from. We use the red pepper flakes we get from pizza shops. We still have some baby utensils, but I find them useful when I’m trying to empty out small-mouthed jars.
There are plenty of Grandma’s (DH’s) glasses we could get rid of. Ditto plastic containers that don’t all have lids.
The only items on the list I have (I hate clutter) is small packets of everything lol – ketchup, mustard, soy sauce, red pepper flakes, peanut butter. Anytime I get extras from eating or taking out I save them. They are all contained in a zip loc bag in the fridge and come in quite handy when packing lunches for work and coolers for the beach.
I should throw out the can opener that doesn’t work right when I try to use it, because I don’t recall which one it is
I too have a stash of plastic silverware that I get from take out places but don’t use because if we are eating that take out at home I’d rather use real utensils- but the plastic comes in handy for roadtrips and work lunches for D when she is home for the summer.
I invested in a nice glass set of containers for leftovers - and reduced greatly my stash of plastic storage - still hang onto the occasional empty yogurt container etc. so when I’m sending leftovers with my kids I pack in these containers which I don’t need back.
I can’t imagine having only one whisk! Doesn’t the author of that list know that different whisks do different things?
I also have two very hole filled dishcloths. They came from the kitchen of my aunt (who was like my grandmother since we didn’t have a grandma and my aunt didn’t have children) who died a few years ago at age 94.
I just won’t part with them. <3
If everything goes according to plan my eldest will be purchasing a house next month! I plan on starting him with some of the glass bowls I got as a wedding shower gift along with other things I have too many of. It’s his first home (he’s only 20) so he will need everything so it will be doubly rewarding!
One spatula ?
One whisk ?
One set of tongs ?
I have multiple of all, and use them all !
I don’t have any take out menus of packets of anything , but I am guilty of food storage container problems
I have a feeling that list was made my somebody that doesn’t cook. I have three spatulas - one silicone for high heat cooking with the wok that would melt regular spatulas. Two others so that when I’m cooking raw meat I can switch to a fresh spatula after the meat is browned to reduce chances of contamination (slim chance I know).
I have three whisks - medium, large, and rubber coated. Definitely need medium and large depending on how much you’re whisking and the size of the bowl, and the rubber one for whisking in a non-stick pan (creme anglais or creme brûlée anyone?).
This list is similar to college ranking lists. What you need/don’t need in your kitchen will vary by person. So you create a list and it gets people talking about things that shouldn’t be on the list and things that should. Works every time. 
^^ which is exactly why I posted it - fun to talk and compare. No two kitchens are alike.
I love our Foreman grill! Hubby is a decided non-cook but uses the grill all the time to make paninis. No need for butter, the grill toasts the bread while melting the cheese and warming any other ingredients. Kids had their own for college apartments - hamburgers, chicken breasts, etc. Much less mess than top of the stove.
I can never have too many rubber/silicone spatulas.
I should get rid of the electric can opener. The manual one is fine.
Exactly.
What I should really get rid of is my collection of dead instant digital thermometers. But, like @jym626 and her can openers, I can never recall which ones are definitively dead. Same thing for corkscrews.
Re unwanted mugs, my church uses everyone’s donated random and weird mugs for coffee hour on Sunday in order to avoid using styrofoam or paper. Very handy.
Thumbs up on the dead digital thermometers and unwanted mugs. I “try” to find uses for the mugs like scooping pet food hoping they will break…but it’s my favorites that break.I have a drawer full of random knives and seem to always use my favorite three or four. I don’t use my cusinart food processor anymore since I moved to a Ninja which is easier to use, cleans easier and takes up less space…but I haven’t had the heart to toss the Cuisinart.
On the list but I could never get rid of our my 3 kids sterling baby cups and spoons. I haul them out now and then and clean the tarnish, but every ding and dent is sooo meaningful.
I cook all the time and I do not own a whisk, a cheese slicer, salad tongs, or a “spatula.” I tossed the ice cream scoop… whatever those gadgets do can be easily done with regular silverware and knives. I have a ton of electrical gizmos: Bamix, Nespresso Pixie and frother, KitchenAid mixer, hand-held mixer, (getting another) Instapot, a couple of electric wine openers, vitamix… no electrical can openers though. Got rid of the panini maker and ice cream maker. It is all reflective of my kitchen habits: I hate grease and splatters, so greasy things go on the grill (e.g. Thanksgiving turkey).
I never use these but I loathe to discard them:
LeCruset dutch oven (still in the original box after 7 years)
Cast Iron dutch oven
Paella pan (too small)
Cast Iron Fish skillet
Egg Beater hand-mixer
Pizza cutter
Stainless steel steam basket
Stoneware ramekins (like for flan)
@momofthreeboys , if you really never use it, donate your cuisinart to Goodwill so that some lucky person can have it.
Today, I am going to harvest the last of my basil and make pesto in mine.
Why on earth would you get rid of sterling cups and baby spoons? Those are heirlooms, not disposables! Give them to your kids when they settle down.
The big step for me will be selling or otherwise disposing of my chocolate business equipment. It’s all still sitting out there. I really need to reclaim the room.