Question

Which grade of plastic is good for health?

Answer 1

If using them for food and drink, Grade 2, 4 and 5 are safe for use.They are:
Type 2: High-Density Polyethylene
Type 4: Low-Density Polyethylene
Type 5: Polypropylene

AVOID 1, 3, 6, and 7.
They are:
Type 1:Polyethylene terephthalate (PET or PETE or polyester)
Type 3:Polyvinyl chloride
Type 6:Polystyrene (PS)
Type 7:Polycarbonate