HELP!!! how do i apologize and make up to my sister?

i went to my sisters room to get something and i dont even know how i accidentally knocked over her brand new perfume bottle...that her BOYFRIEND gave her.. how do i apologize and make her feel better i only have about 4 HOURS 'till she gets home from work. i know her well and she will be very upset i dont have any cash so i cant buy her a new one or anything like that (P.S its Lacoste a touch of pink or something like that, it has an alligator) plus its not the perfume but the sentimental value thats what she will be most upset about . help me please...arghhhhhhh i messed up ......also i dont wanna suck up to her and we dont get along perfectly all the time (she has a temper/attittude thing sometimes) the best answer gets 15 POINTS