I was today years old before I realised that hot water bottles can be dated to within a week of manufacture. Number = year, petal = month, dots = week.
Make sure your hot water bottle is safe before every use.
✔️ Check for signs of wear and tear before use
✔️ Look at the flower symbol on the bottle to show when it was made
❌ Don’t use a hot water bottle more than 2 years old
❌ Never fill a hot water bottle with boiling water.