Can the containers be sent by parcel service?

No, shipping by parcel service or post is not a simple matter.

We strongly advise against it. Objectively speaking, shipping by post or parcel service is an extreme strain on buckets and cups.

The parcel services are naturally under time pressure and in many cases handle the parcels improperly. Extreme acceleration forces occur within the parcel when it is thrown or dropped.

This is why we unfortunately cannot guarantee that lids will open or that our packaging will even break.

For precisely this reason, neither packaging manufacturers, packaging retailers nor parcel service providers can provide any guarantees in this regard.