(Barrel | Hiding place) In a dream, a cask means hypocrisy or concealing evil actions.
Dream dictionary: Cask dream meanings
To see one filled, denotes prosperous times and feastings. If empty, your life will be void of any joy or consolation from outward influences.
Getting new connections.
…Dreaming of sugar, denotes that you will be hard to please in your domestic life, and will entertain jealousy while seeing no cause for aught but satisfaction and secure joys. There may be worries, and your strength and temper taxed after this dream. To eat sugar in your dreams, you will have unpleasant matters to contend with for a while, but they will result better than expected. To price sugar, denotes that you are menaced by enemies. To deal in sugar and see large quantities of it being delivered to you, you will barely escape a serious loss. To see a cask of sugar burst and the sugar spilling out, foretells a slight loss. To hear a negro singing while unloading sugar, some seemingly insignificant affair will bring you great benefit, either in business or social states….
See Cask.