I.up [am. angl. əp, brit. angl. ʌp]PRISL.up often appears as the second element of certain verb structures in English (back up, pick up, sit up, etc). For translations, see the relevant verb entry (back, pick, sit, etc).
The dimples prevent the glass slipping out of the fingers in a washing-up bowl, and the design of the glass emphasises strength, also to withstand frequent manual washing.