I got some from a hobby store to hold my nuts, bolts, and screws seperate in my toolbox. Admittedly, that’s the only use I’ve put them to, but they do exist.
They are quite commonly used in shops to store small items of stock such as earrings or small electronic components - you can buy them by the thousand in a wide range of sizes.
IIRC, you can’t get them anymore in Washington DC. They decided they were being used mainly for drugs so they were banned. Maybe they’ve been discouraged where you live, too.
Jewelry supply – I use them to sort beads. Jewelry supply catalogs sell them in a wide range of sizes. Right now I have 1x1-1/2, 2x3, 3x4 (holds a pair of carded earrings), and 4x6.
There’s a whole string of ‘poster’ and ‘t-shirt’ stores that sell various things ranging from small ziplocs of various sizes to scales, rolling papers and crack pipes. (These stores are distinct from the ones that sell hemp clothing/goods, books about the usefulness of hemp, and tobacco pipes.) What’s really weird about the ziplocs is that they’re available with various logos printed on them that must make high-school dealers seem really, really cool. Marijuana leaves, smiley faces, dollar signs, and so on. Really, really cool.
Occasionally, I’ve seen lab manuals call for putting samples of chemicals into ‘1"×1" polyethylene bags’. This would appear to be a legitimate purpose for these bags, but in reality we’d always use glass sample vials instead. That being said, the aforementioned ‘poster stores’ also sell glass sample vials.
You know that My local walmart banned the sell of hobby ziplock baggies and they wanted to ban all polyethylene bags becuase of there use in drugs but they couldnt get clearence from the head hounchoes.
There is a small head shop in town where My friends buysscreens for there faucets and he has an aboundence of these little baggies. The most popular use I have seen them for around here is putting a days dose of “Nuts and Bolts” in. I live in a small weird druggie counter culture community.