Not all HDPE containers are food safe because some may contain recycled materials. Food safe needs to be virgin HDPE and labeled as such. Having dabbled in the consumer product safety field you learn that there is no such thing as a “safe” plastic, just “safer” plastics. The “HD” means the molecules are more densely packed and leach much less into whatever is being contained, but it still leaches especially as containers age. It’s a personal choice and this is just my opinion, but I try and reduce the use of plastic containers where possible to store food items.