These single-use essence are the cheapest I found on Lazada but if we use the full bottle (1.5ml) in 1 use, my skin doesn't absorb it very well. It feels watery and moisturising and can be applied directly on my skin for all variations without any side effects but probably because it is somewhat diluted hence the low price.
Personally I feel that the biggest downside of this product is that each bottle is super hard to open, simply twisting it doesn't work, easiest is to use scissors but it means we can't keep it after. The alternate way I discovered while trying to finish it is to pull from 1 side using our nails using all my strength and after like 2-3 times it finally opens a gap, from there I can then twist and pull open the cap. Definitely not good for use in the morning if you are in a rush of time.
Since it is moisturising and average kind of effective as Anti-oxidant, plus the low price, I decided to give the bottle version a try. I feel that the Vitamin Chief bottle might still be fine as I should be able to finish in 1 month but the Retinol version might be half wasted as I only use it like twice a week, so 1 month about 8-9 times. It would take about at least 3 months to finish the whole bottle and I am not sure if the freshness would still be there if I do that, so I regretted slightly after the purchase.
Rating: 2 out of 5 for the single-use version and 3.5 out of 5 for the bottle version
Lazada referrer links for the versions that I bought if you plan to check it out:
Single use version (~$5+ for 2 bottles)
Bottle version (~$3+ to $4+ per box depends on what you buy)
Verdict: I would say that I won't recommend these unless you have a tight budget on such products. Those that cost about $10+ for 1 month worth of products are much better. These feels kind of average just that it is super cheap. Bottle version is about 23% of other brand's pricing, single-use version is about 30% of other brand's pricing, exact pricing may vary with the discount offered by Lazada.