a packet of biscuits/cigarettes/crisps

a packet of photographs arrived with themail.

coffee packets/ a packet of sugar / salt

 a pack ofcigarettes.

a slice of bacon

a slice of bread/cake/pizza

 a loaf ofbread,

 a cup oftea/coffee

a glass of water/ a bottle of water/ a bottle ofmilk

a piece of bacon/bread  

a piece of paper/wood/fruit/ advice / funiture/land/news  

 two loaves of bread or two slices of bread.

a jar of jam

a can of cola

 a bowl ofrice

a carton of milk  a carton of  fruit juice

a carton of cigarettes  一条香烟

a cone of ice cream

a tube of toothpaste

a tin of cookies

a bar of chocolate