what?
keep old PET-bottle caps - they are made from flexible PP and can seal watertight.
So this is a small box with a PCO-28 thread (3.18mm pitch )
to store small parts like
- Seeds
- SMDs / electronic components
- micro SD
- cream / makeup for your handbag
- salt sugar or spices for picknick
- small screws / nuts
- samples
- pearls / trinkets
- tablets, pills, drugs or vitamins
- grease or solder paste
- teeth
- small parts
- geocache
Features
- Base ring
- for better grip
- anti-roll-off
- 4 Sizes 17.5, 30 ,50 and 80 mm — Volume ~ 6mℓ, 10mℓ, 20mℓ and 30mℓ
- Parametric for individual length or modifications
- Watertight (if not, smooth the inner rim on top with fine sandpaper)
- String attachment can't slip off between rings
Jack
