PrimePac Ltd makes them Safe:

PrimePac Ltd has introduced a range of bottles designed to prevent sprays from backing off in transit.
3 sizes of round bottles, 125ml, 250ml and 500ml are currently available all in HDPE.

The 125ml is produced with a 24mm snap on neck for a snap on pump, while the 250ml and 500ml have a 28mm ratchet feature suitable for ratchet trigger sprays.