There is always one big challenge in a bar, if somebody is ordering... iced tea. As it is here [in the Middle East] not a regular order, bars usually don't have chilled tea available. If some outlets have it, it is usually... nasty - in old Store 'n Pour containers it taste horrible - already spoiled - or at least soon to spoil. The solution - brewing fresh tea and chilling it down. Problem: the tea just gets watery - if you put ice into it - or it takes a long time [and time it will take anyway], if you are chilling it without direct contact with ice. The ultimate solution: Rapid Infusion Pour ambient water into a iSi siphon [or any competitive brand - we won't do product placement here]. Add loose tea - maybe little bit lemon zest as well - or feel free to add herbs or anything else, if you would like to do specially flavored iced tea. Close the siphon and charge it with one N2O cartridge. Swirl for around 45 seconds. Release gas upright [with ...