Complex sentence: Women had to slide a tiny lever at the side of the tube with the edge of their fingernail to move the lipstick up to the top of the case, although lipsticks in push-up metal containers had been available in Europe since 1911.
Split into simpler sentences: Women had to slide a tiny lever at the side of the tube with the edge of their fingernail to move the lipstick up to the top of the case. Although lipsticks in push-up metal containers had been available in Europe since 1911.