Complex sentence: Marshmallow creme (fluff) was first sold in glass jars in 1925 which provided a longer shelf life which allowed the first shipments outside of New England in late 1927.
Split into simpler sentences: Marshmallow creme (fluff) was first sold in glass jars in 1925. The sealed jars provided a longer shelf life which allowed the first shipments outside of New England in late 1927.