This is a video by Nargis Khan, explaining you the techniques of decoupage on a glass bottle using decoupage napkin.
Best tips: Use wet brush to cut out the napkin to avaoid sharp edges and the napkin merges with the base.
1) Decoupage Napkin : buy it here : Decoupage Napkin
2) Mod Podge Matte : buy it here : Mod Podge 8 0z
3) Gesso & Texture Paste : buy it here : https://www.mrmuffin.in/paint-medium
Watch the video in the below link.