Two bottles that both read 100ml sit on two very different price ladders at the Black Shark™ shop, and the difference between those ladders matters more than the headline price of either. The standard Posing Oil and the Proline 100ml each publish their own quantity breaks, their own percentage-save labels and their own rhythm of step-downs. Placing the two scales next to each other shows something a single product page cannot: where bulk buying genuinely pays, where the savings stall, and how far apart the two products remain once the discounts are applied.
Two 100ml Bottles, Two Distinct Quantity Ladders
Begin with the standard Posing Oil page, which lists a single 100ml bottle at €39.99 and then steps down gently: two bottles at €37.99 each, three at €36.99, four at €35.99, five at €34.99, six at €33.99, seven at €32.99, eight at €31.99, nine at €30.99, and ten or more at €29.99 each. The percentage-save labels printed alongside those tiers run from 5% at two bottles through 8%, 10%, 13%, 15%, 18%, 20% and 23% to 25% at ten-plus. The entire spread is €10 per bottle — a quarter of the single-bottle price — and the steps are small and even: €2 on the first jump, €1 on every one after that.
The Proline 100ml page reads differently in almost every respect. It currently lists €69.99 against a struck-through €90.00, then two bottles at €59.99 each, three at €49.99, four at €47.99, five at €46.99, six at €45.99, seven at €44.99, eight at €43.99, nine at €42.99 and ten-plus at €41.99. The save labels begin at 14% and climb through 29%, 31%, 33%, 34%, 36%, 37% and 39% to 40%. Anyone comparing the standard 100ml bottle against this synthol 100ml listing will notice immediately that the Proline scale is the more dramatic of the two: it covers €28 per bottle of range instead of €10, and it leans far harder on the first few tiers.
Both pages also carry customer ratings — 5.00 from 14 ratings on the standard Posing Oil, 4.75 from 12 ratings on the Proline — but the two are listed as separate products and their prices should never be blended. The Proline is its own bottle with its own discount curve, and the shop’s pre-packed bundles live on separate pages again, sitting alongside the sliding scale rather than replacing it. Reading one page and assuming the other behaves the same way is where most comparisons go wrong.
Where the Proline Curve Bites — and Where It Flattens Out
The most striking feature of the Proline scale is how front-loaded it is. Going from one bottle to two cuts €10 off the per-bottle price, a 14% reduction in a single step. Going from two to three cuts another €10, taking the per-bottle figure to €49.99. In two moves, a buyer has captured a large share of the total available spread. After that the ladder changes character completely: €2 comes off at four bottles, then €1 at each tier from five through nine, and €2 again at ten-plus. The last six tiers together are worth €8 — less than the single jump from one bottle to two.
Set that against the standard Posing Oil scale, which has no early cliff at all. Its first step is worth €2 and every subsequent step is worth €1, all the way down to €29.99. There is no point on the standard ladder where the price falls off a ledge; there is only a long, steady glide. The practical consequence is that the Proline rewards a small commitment far more generously, while the standard bottle rewards patience and volume in a gentler, more predictable way.
The more revealing comparison, though, is the gap between them. At one bottle the Proline sits €30 above the standard bottle. At two bottles the gap is €22. At three it narrows to €13. From four bottles onward it locks at exactly €12 — €47.99 against €35.99, €46.99 against €34.99, and eventually €41.99 against €29.99 at the ten-plus tier. In other words, the aggressive Proline breaks compress a €30 premium down to €12 and then stop compressing it: the two curves run parallel from the fourth bottle onwards.
That has a counterintuitive implication. The Proline scale is more generous in absolute money — its maximum saving is €28 per bottle, against €10 on the standard bottle — yet the discount never makes the Proline cheaper than the standard oil at any quantity. A ten-bottle order on the Proline scale totals €419.90; the same ten bottles of standard Posing Oil total €299.90. The quantity breaks narrow the premium; they do not erase it. Read the percentage labels on each page with that in mind: 40% of a higher starting price is still a bigger euro saving, but 25% of a lower starting price still lands on a cheaper bottle.
Building a Practical Basket Around Either Scale
If price per 100ml is the only measure that matters, the standard scale wins at every tier, and its ten-plus tier at €29.99 is the lowest per-bottle figure either single-bottle page publishes. If the Proline bottle is what you actually want, the sensible break points are easy to identify: three bottles takes the per-bottle price below €50 for the first time, and four bottles captures almost all of the remaining discount, since everything afterwards is worth €2 or less per bottle. Buying ten of any oil purely to reach a tier is only a saving if the bottles get used. These are topical products, sold on the shop’s own statement that they are for topical use only, and the site disclaimer frames its content as general information while recommending that buyers consult appropriate professionals before acting.
Shipping changes the arithmetic less than buyers expect. The shop charges a flat €15 worldwide on every order regardless of quantity, described as express tracked with door-to-door tracking and plain, unbranded packaging. On a single Proline bottle that €15 is a meaningful addition; spread across ten bottles it is €1.50 each. The published delivery guarantee — reship or refund if an order is lost or does not arrive — applies to the order rather than to the bottle. Dispatch is quoted at one to two business days in the FAQ and one to three on the shipping page, with 95% of orders said to go out same day, and the homepage noted a one-week dispatch pause in November 2026 while orders and payments continued to be accepted.
Two other routes deserve a mention. Pre-packed Posing Oil bundles sit on their own pages — two bottles at €75.99, three at €110.99, five at €174.99, ten at €299.99 and twenty at €549.99 — and they land very close to what the sliding scale produces on the single-bottle page, so the choice between them is mostly about convenience rather than price. Then there is the COMPSHOT, a five-pack of 30ml glass vials currently listed at €99.99 (originally €109.99), with per-pack breaks down to €67.99 when five packs are bought; that option suits travel and stage-day kits rather than a 100ml head-to-head. Bulk or custom requests go through the published email, and the About page’s description of the brand as the finest quality available on the market, with discounts for larger quantities, is a claim the shop makes about itself rather than an independent finding.