I have created a list of suppliers for you all. These are who I use. Please bear in mind that I am in the UK, and some suppliers may not be able to ship worldwide.
Enjoy! Jane x
Cupcake cases
360pac.com
Boxes for delivery of bouquets:
For a 7 bouquet
360pac.com
For a 12 bouquet
360pac.com
Cellophane
https://www.countrybaskets.co.uk/dot-cellophane-roll-white-100-m-951138
Tissue paper
Cups
https://cupsdirect.co.uk/products/white-paper-cup?_pos=1&_sid=e4d99867e&_ss=r
Whitener
https://www.thevanillavalley.co.uk/wilton-icing-colours/wilton-white-white-icing-colour-59ml.html
Progels
https://www.thevanillavalley.co.uk/search/for/Progels/
Nozzles
https://www.thevanillavalley.co.uk/search/for/Nozzles/
https://www.cakecraftcompany.com/search/nozzles
Also Amazon and eBay