LTKJ 10 Packs 5ml Reusable Plastic Syringe with 10Pcs Extraction Adapters for Perfumes Transfer to Empty Bottles

Works for me. If one end don't fit, flip it.

Like the easy use of this product. Simple. With digits you accurately draw the correct amount of fragrance you need to decant. The numbers do wear off after a short time tho. Great value for the price. Will be purchasing again.