Consensus has emerged in recent years about the benefits of a dental rinse made of diluted bleach (Annex of links below). Everything that I found online says that bleach is caustic to plastics. Household bleach comes in plastic containers, so there is be chemical interaction with the plastic, even if the container structure is not compromised.
Is there a purer grade of bleach for periodontal purposes? If it is periodontal grade, I would then expect the container to be suitable for the basicity.
ANNEX: CONSENSUS ON ADVISABILITY OF DILUTED BLEACH RINSE LEANING TOWARD 0.25%
0.06% sodium hypochlorite : 6% x (1oz/6tsp) / 16oz = 0.0625% DILUTED BLEACH SOLUTION DIRECTIONS
0.05% to 0.25% : Mouth rinsing With Bleach: A Promising Alternative To Chlorhexidine?
0.25% : Sodium hypochlorite (dilute chlorine bleach) oral rinse in patient self-care
0.25% : SAFELY Use DILUTED BLEACH As MOUTHWASH! - Diluted Bleach Mouthwash Recipe
Overall Google search : dental-rinse bleach