Make the following words plural 1.a piece of beef 2.a cup of tea 3.a bottle of juice 4.a box of glass

Make the following words plural 1.a piece of beef 2.a cup of tea 3.a bottle of juice 4.a box of glass

1.some pieces of beef
2.some cups of tea
3.some bottles of juice
4.some boxes of glass
If it's glasses, a pair of glasses, even the singular is glasses