1. Admin, D. (2015, February 21). Beer carbonation chart: The importance of PSI. Drinktanks [online]. Retrieved Nov 17, 2019, from https://www.drinktanks.com/beer-carbonation-chart-the-importance-of-psi/.
2. Bonneo. (2015). The science of carbonation: A visual guide to great carbonation [online]. Bonneo. Retrieved Nov 17, 2019, from https://www.bonneo.com/blogs/our-creations/19092875-the-science-of-carbonation-a-visual-guide-to-great-carbonation.
3. Dean, R. K., & Subedi, R. (2018). More than a drink: A rare anaphylactic reaction to sparkling water. American Journal of Emergency Medicine [online]. Retrieved March 21, 2019, from https://doi.org/10.1016/j.ajem.2017.10.019.
4. Ebay. (2019). [online]. Retrieved Nov 20, 2019, from https://i.ebayimg.com/images/g/CG8AAOSwe9VcK0CE/s-l1600.jpg.
5. iNeedTheBestOffer. (2017). SodaStream fizzi sparkling water maker. [Image]. INeedTheBestOffer [online]. Retrieved Nov 17, 2019, from https://ineedthebestoffer.com/wp-content/uploads/2017/11/SodaStream-Fizzi-Sparkling-Water-Maker.jpg.