Table top spice shakers set of 2 tupperware products are tested to ensure that they are a safe, non-toxic, attractive and durable alternative to other home storage products. With a little care you can keep your tupperware looking as good as new. Cleaning and storing: wash and rinse tupperware with liquid soap and lukewarm water. Store without seals to keep them fresh. Do not soak polycarbonate range in detergent or soap tight seals: place the seal in warm water for few minutes. Dry thoroughly, then apply to container while still warm. Stain removal: use baking soda paste; it's ideal for reducing of stains and stickiness preventing cuts and scratches: avoid the use of abrasive scrubbers and washing powders liquid storage: only products with classic round seal are liquid-tight and can be kept in any position. Place containers with any other type of seal in upright position.