LDPE or PP, translucent with purple screw caps.

Use for storing and dispensing solutions and media. Round carboys feature an integrated shoulder handle. Graduated to identify the volume dispensed.

LDPE carboys
Ideal for high-purity applications, as they have high resistance to chemicals (widely used in ophthalmic products like eye droppers and nasal sprays).

Preferred resin for cold storage (down to −80 °C), working temperature −80 to +80 °C
Resistant to physical impacts (will not break even if it falls down accidentally, whereas PP carboys may lead to cracking at negative temperatures)
LDPE product, will bounce back to their original shape as highly flexible material
Widely used in pharma industries

PP carboys
For sterile water storage, polypropylene (PP) carboys can be autoclaved before refilling to stop recurring bacterial growth.

Excellent chemical resistance
Working temperature 0 to 135 °C
Autoclavable