The Cocktail Series (カクテルシリーズ) is a vibrant collection of fountain pens by Sailor, modelled after various alcoholic beverages. Sailor releases a new colour each year. The pens usually have a limit of 300 or less before 2017. In 2017, the Apres Ski had a limit of 800, while Tequila Sunrise from 2018 has a limit of 1000. The increase in availability demonstrates the extend of the series’ popularity. You can find the new releases for sale online at Nagasawa or Mitadepa. You may past releases on Kingdom Note or Yahoo! Auctions from time-to-time. A deputy service or a kind friend who lives in Japan is required if you wish to purchase these pens through the above vendors. You may find them on Ebay as well, but the pricing is often less competitive than Japanese vendors, even with the additional cost of a deputy service.
See below for a list of LE Cocktail series fountain pens Sailor had released as of July 13th, 2020.
#1 2011 Asian Way – Profit 21
#2 2012 Mojito – Pro Gear 21k
#3 2013 Black Velvet – Pro Gear 21k
#4 2014 Piccadilly Night – Pro Gear 21k
#5 2015 Old Fashioned – Pro Gear 21k
#6 2016 Blue Lagoon – Pro Gear 21k
#7 2017 Apres Ski – Pro Gear 21k
#7.5 2017 Asian Way – King Profit
#8 2018 Tequila Sunrise – Pro Gear 21k
#9 2019 Angel’s Delight – Pro Gear 21k
#9.5 Europe Exclusive #1 2019 White Russian – Pro Gear 14k
#10 2020 Kure Azur – Pro Gear 21k
LEPENS 
A note, the first pen in the serie from 2011 was actually a regular Profit 21 Asian Way for the Tokyo Area and limited to 200 pens, The King Profit Asian Way was release in 2017/12. see here https://www.kingdomnote.com/item/3717003316508, and https://ameblo.jp/dakenta/entry-11200965499.html.
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Thanks for the correction! I have edited the post accordingly.
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I love writing with my regular sized pro gear’s. I just wish they would release each special edition in a regular size and slim size (maybe even KOP size) because I find the slim size far too small to use comfortably. That White Russian and the Nonble Series would have been immediate purchases if they had the original sizes available.
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