Where can I source PET 5cl bottles, particularly with custom colours?

For small-format 5cl PET bottles with custom colour options, members have successfully used **Embaco** (www.embaco.com). They offer custom colours and tops — one member recently received a quote for blue bottles with pink tops. The supplier was reported as helpful and responsive to inquiries. This appears to be the go-to option for this size and customisation level within the community.