Our toiletries go in them in our carry ons so that they can be pulled out quickly for security.
Then anything that is liquid goes in them to put in the big suitcases. I’ve had one to many bottles of shampoo spill all over my clothes!
When we are travelling as a family I buy the gallon sizes and everyone has a bag that we put our ‘smalls’ in. It makes it sooooo much easier when searching for that time tiny pair of little boy socks when he is in such a hurry to get outside and play with his cousins.
Other uses….crayons, markers, stickers, small books, makeup, small cars, action figures. Seriously, if you are travelling go invest in every size Ziploc they make. It’ll make your life so much easier and you can thank me later 😉