Over on Instructables, Belsey shows how to make your own Alka Seltzer for a fraction of the cost.
As I was making bath bombs to give for Christmas I felt a little heartburn. I reached for the Alka Seltzer... Wow... $8.99 for 36 tablets! One dose is made of 2 tablets, so that comes to 50 cents per dose. Then I looked at the active ingredients. Citric acid and sodium bicarbonate. Exactly what I was using for the bath bombs! Sour salt and baking soda! I made a rapid calculation: one dose comes to 2 grams of citric acid, and 3.88 grams of baking soda. If I figure that citric acid costs $4/lb and baking soda is $1/lb, the exact same dose of alka selzer's active ingredients would cost me about 2.5 cents to make myself.... Twenty times less than the store bought version! OK to be fair, I didn't figure the cost of filler, and the store bought alka selzer also contained aspirin, but I neither needed nor wanted the aspirin. Even if you end up spending more on the citric acid and less for the Alka Seltzer than I did, you'll still come out ahead.
I had the pleasure of writing the cover feature, on Limor Fried (aka “Ladyada”) and her company, Adafruit, for the latest issue of Make: (Volume 57). Since a lot had already been made about the company’s impressive and popular open source product line and Limor as a successful female entrepreneur, I decided to focus on […]
Hackster.io went to the Maker Faire in the East Bay, where they found Tien Pham sporting his latest creation: F.Lashes, interactive LED false eyelashes.
The Shed of the Year contest had a number of worthy entries in 2017, but Paul Foden got my vote just before voting closed. SWNS TV took a tour.
Learning a new language will give your resume an upgrade, sure, but it will also provide a huge cognitive boost for mental tasks outside of translation and conversation. Bilingual brains have been shown to be better at handling multiple concurrent tasks, and gaining fluency in a new tongue is an amazing way to improve memory, […]
If you struggle to get a good night’s rest, consider replacing your pillows before dropping hundreds on a new mattress. You can give your tired neck a break with a 2-pack of memory foam pillows, available now in the Boing Boing Store.Each of these pillows is stuffed with cooling polyurethane foam that molds to your […]
Although flagship smartphones are unlikely to adopt heavy-duty outer casing anytime soon, you can always prepare your device for the outdoors with a beefy case and and an external battery like this Nomad Tile Trackable PowerPack, available in the Boing Boing Store for $119.95.The Nomad Tile can fully recharge an iPhone 7 over three times […]