Oestrogen (joking but also serious)
On a more serious note, a raspberry pi to run pihole and gobble up all the ads for all devices on my home network
1L water bottle, especially if it’s insulated. Keeps your drink cool, but also makes it so I don’t have to get up to get more drinks when I run out.
We had some in a car during a trip to Wonderland during the summer. A Gatorade bottle was disgustingly hot while the insulated bottles still had ice in them.
5/7 would recommend
$20 total or per day? If total, then a dumb stylus for my phone. If per day, then junk food. As an American my retirement plan is to die from heart disease.
I’m surprised I did not think of mentioning it next to the Preppy fountain pen I already mentioned but a reading lamp! This one is 15-18€ clip-on. It’s USB-C (I would prefer standard batteries if there was a model so it doesn’t got to waste one the battery is dead). It’s lightweight and the brightness (as well as its temp) can be adjusted.
Worth every single cent, imho. I find it so useful that I have purchased two, just in case I need to recharge one.