Seconding the LUX mailers from The Boxery. I use the 9x12 and 10x13 sizes most days, the self seal strip is reliable and they don't pop open in transit. Customer service helped me pick the right size for a few odd items and recommended the tear strip option which customers like. Saves me a lot on dimensional weight compared to boxes.

The_nina says theirs has been gone for five years, but that's exactly why keeping it up mattered. Seeing that sign every day was a real reminder. I remember my neighbor saving two dollars a week in that club for his kid's bike, took almost a year. Another lady had a jar for a kitchen remodel. Apps make it invisible and fast. You don't learn that slow, steady patience anymore, or who in your building is saving for what. The lesson was in the waiting.

Skipped primer on light colors and it held up fine. Only use it now when going from dark to light paint.

My off-grid cabin in Montana taught me similar vigilance. I logged inverter output daily for a month. Noticed a steady decline every cloudy afternoon. Turns out my charge controller was overheating in direct sun. Moved it to a shaded box, efficiency jumped 15%. Now I check temps alongside voltage, catches issues earlier.