Reddit reviews SlipX Solutions Adhesive Bath Safety Treads Adds Non-Slip Traction to Tubs, Showers, Pools, Boats, Stairs & More. (Clear, 12 Treads per Pack, 7.5" x 3/4" Each)

Here's a weird one: a butter knife.

I use it to open cans that have a pull-tab top without wrecking my fingers. Stick the tip through the loop, lever up.

See also: an electric can opener, this giant pill organizer, these grab bars that can easily be installed in the tiniest of apartment bathrooms without starting an argument with your landlord (priceless!) combined with this hockey tape (put it on your grab bars and crutch handles to keep your hands from slipping) and these anti-slip stickers, (I even put the stickers on the bathroom floor.)

I was actually going to suggest that Baby Bjorn bouncer! We were living in a small condo when my first was born, and moved when he was about 2 months old. Not only was the folding feature really useful to stash it under the couch, but he liked being more upright to look around, and since it's so light and portable I could take it anywhere. I brought it into the bathroom when I needed to shower, plus to friends houses, on vacation, etc for months just to keep my son contained and entertained. Definitely a winner!

We also had a similar hook-on high chair and doorway jumper, both got a lot of use.

I'd also recommend a folding bathtub, especially since a lot of small apartments only come with showers. (We had to add traction stickers to the bottom of that one, because it's pretty slippery.) In the place we moved to after the condo, the bathroom was so tight that it was tricky for both parents to bathe the baby in the actual tub, so we often took the folding tub on the back porch for bath :) Now that kiddo is 4, the folding tub is great for sensory/water stuff when you don't want to go full pool.