Wow, I wonder how you could cope with a 2 ml version, for me the normal 3 ml glass was a PITA because I was refilling like 2-3 times a day and that constant JCF closing, unscrewing, JCF opening was making me crazy, so I was very glad the 5 ml cleito came around.
But I guess everyone´s mileage may vary
I vape strictly MTL which doesn't consume that much juice. The Berserker has a really tight draw and 2ml and if I fill it up I can leave the house without worrying about carrying a bottle with me.