1) Simple design,compact size: Round shape lids size:3.5";4.5";6.0";8.5";11.5".3 sizes round shape bowl:430ml(fits 4.5" lids) 1L(fits 6.0" lids) 2.9L(fits 8.5" lids) Squareshape lids size:4.0";5.5";7.0";3 sizes square shape bowl:480ml(fits 4.0" lids) 1L(fits 5.5" lids) 2.3L(fits 7.0" lids) 2) Easy to operate...with mechanical locking system,hand-free operation,DIY...self making bag for desired depth3) New Item TV hot sold home and abroad,Can be sole together with the bowl 4)Easy cleaning,removable vacumming interface,dishwashing safe 5)Meet Roshs requairment,with CE certificate,SGS.MSDS.CCIC certification(other country approvals available) 6) Keep food fresh 5 times longer than normal container. Eliminates freezer burn of frozen food items,maitains food taste. 7) Best package for outdoor use like in a picnic,car.Ideal for best hygiene,fresher meal& healther life 8) It also can be used as heat-resisten mat,holding hot still product is available. Package: 1)each lids with paper protector on the film 2) then put each set in a normal opp bag 3)Final put them into color box Also you can use your own design,blister cardor display all ok.