When did PG Tips invent tetrahedron tea bags? Tetrahedron is another word for pyramid-shaped. Actually, PG Tips launched pyramid-shaped (tetrahedron) tea bags in 1996. This shape was chosen because it …
When did PG Tips invent tetrahedron tea bags? Tetrahedron is another word for pyramid-shaped. Actually, PG Tips launched pyramid-shaped (tetrahedron) tea bags in 1996. This shape was chosen because it …