The whole sentence is:
My order reaches €150, I will receive a 15ml Eau de parfum Plumetis, portable vaporizer branded "GALIMARD" , a "trousse" fontaine parfumée and 5% discount.Offer not valid on the "Gift Vouchers"
Thanks!
In this context, the corresponding definition of "trousse" is:
Boîte, étui, pochette de petites dimensions, groupant divers objets correspondant à un usage spécialisé
There are other definitions if you're interrested.
You will most probably receive something like this (image coming directly from the Galimard website, named "gift #34"), which is commonly named "Trousse de toilette"
The closest English word I can find is a "vanity case", I'm not sure though if it's an exact translation as it seems vanity cases tend to be a lot more sophisticated.
